
Define a variable, write an inequality and solve the inequality.

Answer to Problem 7CYU
Variable be x.
Inequality equation: 4x−6>8+2x
x>7
Explanation of Solution
Given:
Four times a number minus 6 is greater than eight plus two times the number.
Concept Used:
Let the number be x.
Translate the statement into an inequality equation.
Inequality equation: 4x−6>8+2x
Calculation:
Inequality equation: 4x−6>8+2x
Solve for x:
4x−6>8+2x4x−6+6>8+6+2x [ Add 6 to both sides ] 4x>2x+144x−2x>2x−2x+14 [ Subtract 2x from both sides ] 2x>142x2> 142 [ Divide both sides by 2]x>7Solution: x>7 or ( 7 , ∞ )
Check the solution when x = 104x−6>8+2x4 · 10 −6>8+2 · 1040−6>8+2034>28 ( True statement )
Thus, solution of the equation is x>7
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