решите уровнения:-20*(х-13)=-220 и (30-7х)*8=352
-20*(х-13)=-220
x-13=-220:(-20)
x-13=11
x=11+13
x=24
(30-7х)*8=352
30-7x=352:8
30-7x=44
-7x= 44-30
-7x=14
x=-2
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-20*(х-13)=-220
x-13=-220:(-20)
x-13=11
x=11+13
x=24
(30-7х)*8=352
30-7x=352:8
30-7x=44
-7x= 44-30
-7x=14
x=-2