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Anonymous users2024-02-111) 66x+17y=3967
25x+y=1200
Answer: x=48 y=47
2) 18x+23y=2303
74x-y=1998
Answer: x=27 y=79
3) 44x+90y=7796
44x+y=3476
Answer: x=79 y=48
4) 76x-66y=4082
30x-y=2940
Answer: x=98 y=51
5) 67x+54y=8546
71x-y=5680
Answer: x=80 y=59
6) 42x-95y=-1410
21x-y=1575
Answer: x=75 y=48
7) 47x-40y=853
34x-y=2006
Answer: x=59 y=48
8) 19x-32y=-1786
75x+y=4950
Answer: x=66 y=95
9) 97x+24y=7202
58x-y=2900
Answer: x=50 y=98
10) 42x+85y=6362
63x-y=1638
Answer: x=26 y=62
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Anonymous users2024-02-101. Original formula = x (10x + 20 + x - 1) = x (11x-19) substitute data to obtain the original formula = 42
2. Original formula = x (x-3-2x 2-2x) = -x (2x 2+x+3) substitute data to obtain the original formula = -72
3. The original formula = ab-ac-bc + ab + ac-bc = 2b (a-c) is substituted into the data to obtain the original formula = -5
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Anonymous users2024-02-091。Original = 10x+20+x 2-x
x^2+9x+20
2.The original form is not right, right?
3.Original formula = ab-ac-bc + ab + ac-cb = 2ab
When a=1 2 b=-1.
2ab=2*1/2*(-1)=-1
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Anonymous users2024-02-08Just bring it in and you're good to go! It's addition and subtraction...
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Anonymous users2024-02-07Original formula = 2 3 power of a 1 4 power a 1 2 power a 5 6 power of a.
A to the power of (2 3 + 1 4-1 2-5 6).
A is -5 to the 12th power.
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Synchronous Syllabus Exercise] (45 minutes, full score of 100 points) 1 Calculation problem: (10 5 = 50). >>>More
1.(-1/3) -(6) = 6-1 3 = 17 32(-3)-5/21 (-1/7) = -3+5 3=4 33 >>>More
Original = [(-6 -4)-(15 -8)] [-2-(-7 -16)]
3 2-15 8] [-2 -7 16] Simplification. >>>More
——— the above calculation questions, I am looking for death, and some of them are written by myself) 1 Calculation questions: (10 5=50 ) >>>More
Is it n+3, or (n+3), if it is the former, the answer should be 5 to teach you a simple way, because n-> so 1 and 3 can be ignored, 2n 2=2, in fact, this is very natural, for this kind of simplicity you can see at a glance, of course, if you can't see it at once, divide the numerator by the denominator, and divide the polynomial by the polynomial, such as (2n-1) (n+3)=2-7 (n+3). >>>More