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OpenStudy (ccastudentgrade10):
WILL MEDAL AND FAN Solve the system by substitution: {-x - y - z = -8 {-4x + 4y + 5z = 7 {2x + 2z = 4 please explain each step you do so i can learn how to do this
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OpenStudy (jchick):
I will help one second please
OpenStudy (jchick):
Any ideas how to start?
OpenStudy (jchick):
First Step: you have to clear one of the variables of any equation and substitute it in the other two
OpenStudy (jchick):
OpenStudy (jchick):
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OpenStudy (jchick):
OpenStudy (jchick):
OpenStudy (jchick):
Thus your answers are x= 0, z = 2, and y = 6
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