1) a) 2x – 5 = 7x + 25
b) 4x – 3 = 8x + 9

c) 3x – 1 = 5x + 7
d) 2x – 5 = 7x + 25

2) a) 3x – 2∙(4x – 1)=12
b) 5 – 3∙(2x – 5)=4x

c) 2x – 3∙(4x – 1)=13
d) 7 – 2∙(4x – 3)=5x

3) a) 4∙(5x – 2) + 3=2∙(10x – 1)
b) 3∙(2x – 3) + 1=2∙(3x – 4)​