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pishuonlain [190]

3 years ago

6

Solve x: 3x-7 = 5x+13 Solve x: 7-3x = 5x+13

2 answers:

Karolina [17]3 years ago

8 0

1.
Since <span>5x</span><span> contains the </span>variable<span> to solve for, move it to the left-hand side of the </span>equation<span> by subtracting </span><span>5x</span><span> from both sides.
</span><span>3x−7−5x=13

</span>Add <span>3x</span><span> and </span><span>−5x</span><span> to get </span><span><span>−2x</span>.
</span><span>−2x−7=13

Move -7 to the right hand side of the equation.
</span><span>−2x=7+13

</span>Add 7<span> and </span>13<span> to get </span><span>20.
</span><span>−2x=20

</span>Divide<span> each </span>term<span> in the </span>equation<span> by </span><span><span>−2</span>.

</span><span>x=−10
</span>
2.
Since <span>5x</span><span> contains the </span>variable<span> to solve for, move it to the left-hand side of the </span>equation<span> by subtracting </span><span>5x</span><span> from both sides.
</span><span>7−3x−5x=13

</span>Add <span>−3x</span><span> and </span><span>−5x</span><span> to get </span><span><span>−8x</span>.
</span><span>7−8x=13

Move 7 to the right hand side of the equation.
</span><span>−8x=−7+13

</span>Add <span>−7</span><span> and </span>13<span> to get </span><span>6.
</span><span>−8x=6

</span>Divide<span> each </span>term<span> in the </span>equation<span> by </span><span><span>−8</span>.

</span><span>x=−<span>3/4</span></span>

Svetach [21]3 years ago

4 0

First you need to combine like terms
7-3x= 5x+13
step 1 add 3x
7=8x+13
step 2 subteact 13
-6=8x
step 3 divide both sides by two
x=-3/4

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