Solve for y, z, a
a=12
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7y=42\times 2
Consider the first equation. Multiply both sides by 2.
7y=84
Multiply 42 and 2 to get 84.
y=\frac{84}{7}
Divide both sides by 7.
y=12
Divide 84 by 7 to get 12.
z=12
Consider the second equation. Insert the known values of variables into the equation.
a=12
Consider the third equation. Insert the known values of variables into the equation.
y=12 z=12 a=12
The system is now solved.
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