Question

решить уравнение
3(0,4х+7)-4(0,8х-3)=1

Answer 1

3*(0.4x + 7) - 4*(0.8x - 3) = 1
1.2x + 21 - 3.2x + 12 = 1
-2x = -32
x = -32/-2 = 16;