Question

розвяжіть рівнняня 7(x-1)+2(x+3)=7-x?

Answer 1

$7(x-1)+2(x+3)=7-x\\\\7x-7+2x+6=7-x\\\\9x+x=7+1\\\\10x=8\\\\x=8:10\\\\\boxed{x=0,8}$

Answer 2

7 ( х - 1) + 2 ( х + 3) = 7 - х
7 х - 7 + 2 х + 6 = 7 - х
9 х - 1 = 7 - х
9 х + х = 7 + 1
10 x = 8
x = 4/5
x = 0,8