Question

(i) if x=27, find y (ii)if y =25, find x

Answer 1

Step-by-step explanation:

5y+21=2x

5y+21=42

y=21/5

5y+21=2x

5×25+21=2x

146=2x

x=73

Answer 2

Step-by-step explanation:

2x+5y+21=180

if x=27

2(27)+5y+21=180

75+5y=180

5y=105

y=21

if y=25

125+2x+21=180

146+2x=180

2x=34

x=17