Question

X+17=77-4X=? Как решить

Answer 1

$x + 17 = 77 - 4x \\ x + 4x = 77 - 17 \\ 5x = 60 \\ x = 60 \div 5 \\ x = 12$

Answer 2

$x+17=77-4x\\x+4x=77-17\\5x=60\\x=\frac{60}{5} \\x=12$