Answer:
x = 5 and y =16
Step-by-step explanation:
Substitution is done by substituting one equation into another. To begin solve one equation for a variable.
x + 1/4y = 9 becomes x = -1/4y + 9. Substitute this equation into the other equation.
2(-1/4y+9) + 2y = 42
-2/4y + 18 + 2y = 42
-1/2y + 18 + 2y = 42
1.5y + 18 = 42
1.5y = 24
y = 16
Substitute y = 16 into one of the equations and solve for x.
x + 1/4(16) = 9
x + 4 = 9
x = 5
