Question

7х-9=3х+7 решите плииииииииз

Answer 1

$7x - 9 = 3x + 7 \\ 4x = 16 \\ x = 4$

Answer 2

$7x - 9 = 3x + 7 \\ 7x - 3x = 7 + 9 \\ 4x = 16 \\ x = 16 \div 4 \\ x = 4$