How to solve the equations like 3.4x + 1.8 = 8.6 and 5x-x = 24

How to solve the equations like 3.4x + 1.8 = 8.6 and 5x-x = 24


3.4x + 1.8 = 8.6 (both sides △ 2)
1.7x + 0.9 = 4.3 (simultaneously × 10)
17x=34
x=2
5x-x=24
4x=24
x=24/4
x=6



Solution equation: 0.4x + 0.90.5 − 0.03 + 0.02x0.03 = x − 52


After sorting out, we get 4x + 95 − 3 + 2x3 = x − 52, remove denominator, 6 (4x + 9) - 10 (3 + 2x) = 15 (X-5), remove bracket, 24x + 54-30-20x = 15x-75, transfer term, 24x-20x-15x = - 75-54 + 30, merge, get - 11x = - 99, coefficient is 1, get x = 9