Question

Use substitution to solve the system.
2x+3y=10
y=3x+7

Answer 1

@Nnesha @phi

Answer 2

@zepdrix

Answer 3

the second equation tells you that
y EQUALS 3x+7

SO
Go to the first equation - and wherever there is a y you can write 3x+7

when you do that you can see that there is only x in the new equation - so you can work out x

Do that first...

Answer 4

2x+3(3x+7)= 10?

Answer 5

yes- good

now distribute the 3 into th ebracket - and collect 'like terms' together