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OpenStudy (anonymous):
Solve the system by substitution. -x-y-z=-8 -4x+4y+5z=7 2x+2z=4 PLEASE HELP!!!!!!!!
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OpenStudy (shamil98):
2x + 2z = 4 solve for z. z = 2 -x Substitute into other two equations and solve for the other two variables, then after finding the value of those two variables sub x back in z to find the value of z.
OpenStudy (mertsj):
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