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How do you solve #3x + 5 = 2 ( x + 7 )#?

Answer 1

Work backwards to solve for x

To find something that is lost work backwards to find what is lost.

The order of operations backwards is PESADM

Think about like this. " if you lose something in PE you are a SAD M(an)(am)

First remove parenthesis and exponents ( PE) then remove addition and subtraction by doing the opposite. (SA) Then remove multiplication and division by doing the opposite.

First remove parenthesis

# 2( x +7) = 2x + 14# so

# 3x + 5 = 2x + 14 # Remove the +5 by adding the opposite -5

# 3x + 5 -5 = 2x + 14 -5 # This gives

# 3x = 2x +9 # Remove the 2x by adding the opposite -2x

# 3x -2x = 2x -2x +9 # This gives

# x =9 #

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Answer 2

Eli Assouline

To solve the equation 3x + 5 = 2(x + 7):

Distribute 2 into (x + 7): 2x + 14
Rewrite the equation: 3x + 5 = 2x + 14
Subtract 2x from both sides: x + 5 = 14
Subtract 5 from both sides: x = 9

Therefore, the solution to the equation is x = 9.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.