Solve for y, z, a
a=1
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-240+y+0\times 55=-70
Consider the first equation. Do the multiplications.
-240+y+0=-70
Multiply 0 and 55 to get 0.
-240+y=-70
Add -240 and 0 to get -240.
y=-70+240
Add 240 to both sides.
y=170
Add -70 and 240 to get 170.
y=170 z=1 a=1
The system is now solved.
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