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3 years ago

How do I simplify an expression

2 answers:

8 0

Do     Parenthesis
          Exponents   [brackets]
          Multiplication
          Division
          Addition
         Subtraction

do PEMDAS in order.

you also need to do what comes first
so if in the expression subtraction comes before addition you do subtraction first. If division comes before multiplication do division first even though multiplication comes first in PEMDAS

Sladkaya [172]3 years ago

7 0

Start with parentheses first
Afterwards do exponents
Next do either multiplication or division (L to R)
Then Addition and Subtraction (L to R)
__________________________________________
Then solve to find your answer

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What is the solution set for the following system of equations 5x-3y-10=0 x+y-7=0

garik1379 [7]

(x, y) = ( $\frac{31}{8}$ , $\frac{25}{8}$ )

given the 2 equations

5x - 3y - 10 = 0 → (1)

x + y - 7 = 0 → (2)

rearrange (2) to obtain y in terms of x

y = 7 - x → (3)

Substitute y = 7 - x into (1)

5x - 3(7 - x) - 10 = 0

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8x = 31 ( divide both sides by 8 )

x = $\frac{31}{8}$

Substitute this value into (3) for y

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