Question

е)7x-8=4x-(1-3x)
ж)3(x+4)=-4(x-3)

Answer 1

7x-8=4x-(1-3x)
7x-8=4x-1+3x
7x-8-4x+1-3x=0
0-7=0
-7=0

3(x+4)=-4(x-3)
3x+12=-4x+12
3x+12+4x-12=0
7x=0
x=o : 7
x=o