y = y
5 x + 15 = 10 x + 10
Divide both sides by 5
x + 3 = 2 x + 2
Subtract 2 to both sides
x + 1 = 2 x
Subtract x to both sides
1 = x
x = 1
y = 5 x + 15
y = 5 • 1 + 15 = 5 + 15 = 20
OR
y = 10 x + 10
y = 10 • 1 + 10 = 10 + 10
y = 20
The solution is:
x = 1 , y = 20
You can write solution as:
( 1 , 20 )
y = 5x + 15
y = 10x + 10
1 answer