Question

(x+240)×3-360=540 какое будет решение

Answer 1

$3x + 720 - 360 = 540 \\ 3x = 540 - 720 + 360 \\ 3x = 180 \\ x = 60$

Answer 2

(X+240)×3-360=540
(x+240)×3=540+360
(X+240)×3=900
X+240=900:3
X+240=300
X=300-240
X=60