1) а)-(7-3y)=(2-y)= b)-5(2-2x)= 2(x-3)+4 w)2x-4(x+7)=3(2-x)

Question

1) а)-(7-3y)=(2-y)= b)-5(2-2x)= 2(x-3)+4 w)2x-4(x+7)=3(2-x)

Answer 1

А) - (7 - 3у) = (2 - у)
    - 7 + 3у = 2 - у
      3у + у = 7 + 2
      4у = 9
        у = 2,25
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б) - 5(х - 3) = 2(х -3) + 4
    - 15х + 15 = 2х - 6 + 4
    -15х - 2х = - 6 + 4 - 15
    - 17х = - 17
          х = 1
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в) 2х - 4(х + 7) = 3(2 - х)
    2х - 4х - 28 = 6 - 3х
    - 2х + 3х = 6 + 28
      х = 34

Answer 2

А)=4у-9
б)=8х-8
в)=х-22