Решите уравнения! на 9х-32=2+5х 45-2х=3х+5 7(5-х)+2=5(6-х)+1 - вопрос №93225452357525618943045 от kotяplay12 10.01.2020 03:54

Question

Математика: Решите уравнения! на 9х-32=2+5х 45-2х=3х+5 7(5-х)+2=5(6-х)+1

kotяplay12 · Answer

1) 9x - 32 = 2 + 5x
9x - 5x = 2 + 32
4x = 34
x = 34/4 = 8.5

2) 45 - 2x = 3x + 5
3x + 2x = 45 - 5
5x = 40
x = 8

3) 7(5 - x) + 2 = 5(6-x) + 1
7 * 5 - 7x + 2 = 5 * 6 - 5x + 1
35 - 7x + 2 = 30 - 5x + 1
35 + 2 - 30 - 1 = -5x + 7x
2x = 6
x = 3