Question

Solve the system, using substitution. Show work please! thanks!
(a,b).
a + b = 4 and 2a + 3b = 11

Answer 1

In your first equation, solve for either variable. Then substitute what you get from that, into the second equation. Should become obvious from there.

Answer 2

a=4-b
substitute a in 2nd equation

Answer 3

Yes what they said... make your other equation 2(4-b)+3b=11

Answer 4

So that will become 8-2b+3b=11

Answer 5

Simplify that into 8+b=11

Answer 6

that turns into b=3

Answer 7

Now take your value for b and substitute it into the equation

Answer 8

2(4-b)+3b=11
8-2b+3b=11
8+b=11
b=3

Answer 9

a+(3)=4

Answer 10

a=1 so b=3 and a=1