Question

Решите уравнение:
1. 5x-(3x-5)=7
2.(5x-6)-8x=18
3.7x-(5x-4)=11
4.(3x-4)-8x=16

Answer 1

1. 5x-3x+5=7
  2x=2
x=1
2. 5x-6-8x=18
-3x=24
x=-8
2.7x-5x+4=11
2x=7
x=3,5
4. 3x-4-8x=16
-5x=20
x=-4