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4 years ago

11x + 12 = 8x - 9 ... please

Mathematics

2 answers:

balandron [24]4 years ago

6 0

Inverse operations should be your first choice
11x+12=8x-9
-8x. -8x
3x+12=-9
-12 -12
3x=-21
Dived both side by 3
X=-7

Marat540 [252]4 years ago

4 0

Assignment: $\bold{\Solve \ Equation: \ 11x+12=8x-9}$

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Answer: $\boxed{\bold{x=-7}}$

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Explanation: $\downarrow\downarrow\downarrow$

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[ Step One ] Subtract 12 From Both Sides

$\bold{11x+12-12=8x-9-12}$

[ Step Two ] Simplify

$\bold{11x=8x-21}$

[ Step Three ] Subtract 8x From Both Sides

$\bold{11x-8x=8x-21-8x}$

[ Step Four ] Simplify

$\bold{3x=-21}$

[ Step Five ] Divide Both Sides By 3

$\bold{\frac{3x}{3}=\frac{-21}{3}}$

[ Step Six ] Simplify

$\bold{x=-7}$

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$\bold{\rightarrow Mordancy \leftarrow}$

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