Mathematics: PLSSSSSS HELP BRAINLIST

PLSSSSSS HELP BRAINLIST - id6731213, shongmadi77

whatnowb

28.01.2022

The step 4 is not what he should have done. But the wrong is step 5, because if he added -2x both sides, it would give the following equation:

x-12=-4x+6

and not x-12=6

Note that in step 4 he should have added 2x and not -2x to both sides, but we still have the equality. The problem is that step 5 is totally wrong.

I don't know what answer is expected to this question, but I would mark step 5, because this is mathematically wrong.

Solving the equation

3(x-4)=-4-2(x-5)

Using distribution

$3x-12=-4-2x+10\\3x-12=-2+6$

Add both sides

3x-12+2x=-2x+6+2x

5x-12=6

Add 12 both sides

$5x-12+12=6+12\\5x=18$

Divide both sides by 5

$x=\frac{18}{5}$

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mari8493

25.11.2021

6.5 = -3 + n

Add 3 to both sides:

9.5 = n

n = 9.5

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