How do you solve $-5m+8=18$ in two ways?

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Answer 1 · 2016-12-06T17:12:24

$m = -2$

1.) One way...

$-5m + 8 = 18$

Subtract both sides by 8.

$-5m + 8 - 8 = 18 - 8$
$-5m = 10$

Divide both sides by $-5$

$(-5m)/-5 = 10/-5$

$m = -2$

2.) Another way...

$-5m + 8 = 18$

Multiply both sides by $-1$

$(-1)*(-5m + 8) = (-1)*18$

$5m - 8 = -18$

Add both sides by 8.

$5m - 8 + 8 = -18 + 8$
$5m = -10$

Divide both sides by 5.

$(5m)/5 = (-10)/5$

$m = -2$

How do you solve -5m+8=18-5m+8=18 in two ways?