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Can someone please explain to me the "therefore" part, below? In both "therefore" cases, I see three unknowns and only two equations. How can w=y and x=z ??

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by MartyMurray » Sat Apr 30, 2016 8:04 pm

ntquigley wrote:Can someone please explain to me the "therefore" part, below? In both "therefore" cases, I see three unknowns and only two equations. How can w=y and x=z ??

w + x = 90
x + y = 90

Since both equal 90, set them equal to each other.

w + x = x + y

Subtract x from both sides.

w = y

I suspect that you can do the other one yourself now.

Marty Murray
Perfect Scoring Tutor With Over a Decade of Experience
MartyMurrayCoaching.com
Contact me at [email protected] for a free consultation.

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