Can someone please help with this problem?

[6.02] For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

−x + 2y = 9
4x + 5y = 9

−9 + 2y
−9 − 2y
9 − 2y
9 + 2y

Question

Can someone please help with this problem?

[6.02] For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

−x + 2y = 9
4x + 5y = 9
 	
	−9 + 2y
	−9 − 2y
	9 − 2y
	9 + 2y

amistre64 · Answer

you might need to isolate x in the first equation .....

amistre64 · Answer

determine which equation is the "first" equation.

and since they do not start you off working systems of equations without first going over how to solve an equation for a given variable .... you would then need to apply those techniques to the first equation to solve for x