Объяснение:
1
1).9x-8=4x-12
9x-4x=12+8
5x=20
x=20
2).9-7(x+3)=5-4x
9-7x-21=5-4x
-12-7x=5-4x
-7x+4x=5+12
-3x=17
x=-17/3
2.
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Answers & Comments
Объяснение:
1
1).9x-8=4x-12
9x-4x=12+8
5x=20
x=20
2).9-7(x+3)=5-4x
9-7x-21=5-4x
-12-7x=5-4x
-7x+4x=5+12
-3x=17
x=-17/3
2.