Question

Решите уравнение:
3,5x-2,8=1,4x+1,4.

ДАЮ 40 БАЛЛОВ!

Answer 1

$3,5x-2,8=1,4x+1,4\\5x-4=2x+2\\3x=6\\x=2$

Answer 2

$3.5x - 2.8 = 1.4x + 1.4 \\ 3.5x - 1.4x = 1.4 + 2.8 \\ 2.1x = 4.2 \\ x = 4.2 \div 2.1 \\ x = 2$