Question

7m+n =46
m-3n=16

solve using the substitution method

Answer 1

Substitution means substituting the value of one variable (in terms of the other variable)
In this example, let's rewrite equation 2 as:

m = 3n + 16.

Thus, we can write m in terms of n, and substitute it in equation 1.

So equation 1 becomes :

7(3n+16) + n = 46.

Now, this equation has only one variable, n, so you can find n from it. Once you find n, put it in the previous equation to find m.

Answer 2

so would it be 21n+112+n=46
22n+112=46
22n+112-112=46-112
22n=-66
n=-3

m=3(-3)+16
m=-9+16
m=7

Answer 3

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@87corb05

If you followed what @sid1729 said, you would get the answers which you arrived to. Good job, your answer is correct! :)