упростить 0,8(x-2)-0,7(x-1)=2,7

Distribute: 0.8x - 1.6 - 0.7x + 0.7 = 2.7.
Combine like terms: (0.8x - 0.7x) + (-1.6 + 0.7) = 2.7.
Simplify: 0.1x - 0.9 = 2.7.
Add 0.9 to both sides: 0.1x = 3.6.
Divide by 0.1: x = 36.