Question

How do you solve 2x+7y=30 and x=48−9y using substitution?

Answer 1

just substitute the value of x

2(48-9y) +7y= 30

96-18y+7y= 30

-11y= 30-96

y= 66/11

y= 6

now,

x= 48- 54

x= -6