Помогите решить 2-ве верхние

5x - (4 - 2x) = 8 + 3x 5x - 4 + 2x = 8 + 3x 5x + 2x - 3x = 8 + 4 4x = 12 (:4) x = 3 7x + 2(-4+x) = 9 - 2x 7x - 8 + 2x = 9 - 2x 7x + 2x + 2x = 9 + 8 11x = 17 (:11) x = 17/11 (дробь)