Question

PLEASE HELP ME ASAP I WILL MARK YOU AS BRILLIANT
please help with these three

Answer 1

26: x=34

28: x=17

30: m=30

Explanation:

26: 2x+22=90

subtract 22

2x=68

divide by 2

x=34

28: 18+3x+21=90

add 18 and 21

3x+39=90

subtract 39

3x=51

divide by 3

x=17

30: 43+87+m+20=180

add 43 and 87 and 20

m+150=180

subtract 150

m=30