-10+5=7x-4how to i explain this step by step

Mathematics

2 answers:

olasank [31]3 years ago

8 0

Answer:

5/7 x 4 = 2.8571 in decimal form.

o-na [289]3 years ago

6 0

Answer:

x = -1/7

Step-by-step explanation:

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

PEMDAS =

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

& is the order of operation.

First simplify the expression to the left: -10 + 5 = 5 - 10 = -5

-5 = 7x - 4

Next, isolate the variable, x. Do the opposite of PEMDAS. Add 4 to both sides:

-5 (+4) = 7x - 4 (+4)

-5 + 4 = 7x

-1 = 7x

Divide 7 from both sides:

(-1)/7 = (7x)/7

-1/7 = x

x = -1/7

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