Solve for x, y
x=7Mm
y=35Mm
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y-5x=0
Consider the first equation. Subtract 5x from both sides.
x=7Mm,-5x+y=0
To solve a pair of equations using substitution, first solve one of the equations for one of the variables. Then substitute the result for that variable in the other equation.
x=7Mm
Pick one of the two equations which is more simple to solve for x by isolating x on the left hand side of the equal sign.
-5\times 7Mm+y=0
Substitute 7mM for x in the other equation, -5x+y=0.
-35Mm+y=0
Multiply -5 times 7mM.
y=35Mm
Add 35mM to both sides of the equation.
x=7Mm,y=35Mm
The system is now solved.
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