Question 1185865: In each pair, decide which question you will you use first to solve for one variable om terms of the other variable. Do that step. Do not solve the linear system.
a) x + 2y = 5
3x + 2y = 6
b) 2x + y = 6
3x + 2y = 10
c) 2x + 5y = 7
x - 3y = -2
d) 3x - y = 5
7x + 2y = 9
e) 2x - y = 2
4x + y = 16
Found 2 solutions by greenestamps, josgarithmetic:
Answer by greenestamps(13200)   (Show Source):
You can put this solution on YOUR website!
Apparently you are being taught very specific methods for solving systems of two equations by asking certain questions....
But we have no idea what those questions are. So, the way you posted the problem, there is no way we can help.
Re-post in a way that we know what you/we are supposed to do.
Answer by josgarithmetic(39618)  (Show Source):
You can put this solution on YOUR website! The questions to choose from or to look for are not made clear.
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a) x + 2y = 5
3x + 2y = 6
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Add the opposite of equation 1 to equation 2, which eliminates y, and quickly find the x value. If you instead want to use substitution to begin, then solve equation 1 for x, and substitute into equation 2.
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b) 2x + y = 6
3x + 2y = 10
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Solve equation 1 for y, and substitute this into equation 2; and solve first for value of x from this.
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c) 2x + 5y = 7
x - 3y = -2
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You can figure what to do now.
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d) 3x - y = 5
7x + 2y = 9
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Take equation 1 and solve y in terms of x; and substitute into equation 2, and ....
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e) 2x - y = 2
4x + y = 16
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...!
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