Question

I need ans asap

4p + 2q = 2

8 = 5p + 7q

Find q, round answers to 1 decimal place.

Answer 1

The answer is 3.1 to 1d.p

Explanation:

1)4p+2q=2

2)5p+7q=8

3)7(4p+2q=2)

4)2(5p+7q=8)

3)28p+14q=14

4)10p+14q=16

18p=2

divide both sides by 18

18p/18=2/18

p=1/9

substitute into equation 1

4(1/9)+2q=2

4/9+2q=2

2q=2-4/9

2q=14/9

divide both sides by 2

2q/2=14/9/2

q=28/9

q=3.1 to 1d.p