SIMULTANEOUS EQUATIONS
Algebra
Step 3.
Solve the resulting equation.
3
12
5
6y
5
5y
3
36
5
18y
5
5y
3
(5)
36
5
18
5
y
5y
3(5)
36
18y
25y
15
7y
15
36
7y
21
7y
7
21
7
y
3
Step 4.
Substitute y = -3 into one of the original equations and solve for x.
5x
6y
12
5x
6(
3)
12
5x
18
12
5x
12
18
5x
30
5x
5
30
5
x
6
Step 5.
Check the solution by substituting x = 6 and y = -3 into the other original
equation.
3x + 5y = 3
3(6) + 5(-3) = 3
18 - 15 = 3
3 = 3
Thus, the solution checks.
MA-02
Page 36
Rev. 0
