9х+10=0 -9х+9=-8 -3х+5=7х х+12=4х
9X + 10 = 0 9X = - 10 X = - 10/9 = - 1 1/9 -------- - 9X + 9 = - 8 - 9X = - 17 X = 17/9 = 1 8/9 -------- - 3X + 5 = 7X 7X + 3X = 5 10X = 5 X = 0,5 --------- X + 12 = 4X 4X - X = 12 3X = 12 X = 4
Решите задачу: