Question

solve the systen 3x-2y=10
y=2x+5

Answer 1

3x - 2y = 10
________________ Add straight down

6x = 24 ...Divide by 6

x = 4

Substitute 4 in for x in one equation

3(4) + 2y = 14
12 + 2y = 14 ... Subtract 12 on both sides

2y = 2
y = 1

Answer 2

3x-2(2x+5)=10
3x-4x=20
-x=20
x=-20
replace it to the 2nd eq
y=-40+5
y=-35

Answer 3

x=-20
y=-35