Найдите корень уравнения:
1. 10х+7=8х-9
2. 20-3х=2х-45
3. 2.7+1.9х=2х=1.5
13 7
4. 18х+13= 12х+8

Решите уравнение:
1) 4(13-3х)-17=-5х
2) (18-3х)-(4=2х)=10
3) 14-х=0.5(4-2х)+12
4) 4х-3(20-х)=10х-3(11+х)
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Помогите,пожалуйста :3
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