Solve for x, y, z
x=10
y=40
z=40
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4\times 10=y
Consider the second equation. Insert the known values of variables into the equation.
40=y
Multiply 4 and 10 to get 40.
y=40
Swap sides so that all variable terms are on the left hand side.
z+10+40=90
Consider the third equation. Insert the known values of variables into the equation.
z+50=90
Add 10 and 40 to get 50.
z=90-50
Subtract 50 from both sides.
z=40
Subtract 50 from 90 to get 40.
x=10 y=40 z=40
The system is now solved.
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