Question

Решить уравнение:3*(2*х - 0,8) = 28(3*х - 1,2)​

Answer 1

3*2x-3*0,8

6x-2,4

28*3x-28*1,2

84x-33,6

Answer 2

$3 \times (2x - 0.8) = 28(3 \times x - 1.2) \\ \\ 6x - 2.4 = 84x - 33.6 \\ \\ 6x - 84x = - 33.6 + 2.4 \\ \\ - 78x = - 31.2 \\ \\ x = 0.4$