Question

1) a – 16 = - 8b
2ª – 13 = 3b
2) 6 + 2y = 7x
3y – 14 = -x
3) 7m – 15n = 1
-(m + 6 n) = 8
4) 2a + 5b =2,5
6a – 1,1 = b

Answer 1

√(3x+7)=4

√(3x+7)²=4²

3x+7=16

3x=16-7

3x=9

x=9/3

x=3

√(2x-3)=5

√(2x-3)²=5²

2x-3=25

2x=25+3

2x=28

x=14