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irina [24]
3 years ago
5

What do I need to use for this answer 7x+2=30 do I use addition , multiplication , subtraction , or division , and then what do

I use to allege the 2 one subtraction , division . Addition , or multiplication ? I need help it’s confusing.
History
2 answers:
dsp733 years ago
7 0

Answer:

x = 4

Explanation:

You are solving for x. Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS. Note that:

PEMDAS =

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

7x + 2 = 30

First, subtract 2 from both sides:

7x + 2 (-2) = 30 (-2)

7x = 30 - 2

7x = 28

Next, divide 7 from both sides:

(7x)/7 = (28)/7

x = 28/7

x = 4

x = 4 is your answer.

~

miskamm [114]3 years ago
5 0
First subtract the 2 to isolate the 7x. Remember what you do to one side you do to the other, so then you would subtract 2 from 30 as well giving you 7x=28. After that in order to isolate x, you would divide by 7 on both sides giving you x=4.
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