Question

Which equation, when solved, glves 8 for the value of x?

5
7
3
3
OA. 2x+ź= 4x+14
OB. 1-9=34-12
OC 41-2=15-4
OD. *-7= x+14
Reset
Ne
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Answer 1

C

Explanation:

`(5x)/(2) +(7)/(2) =(3x)/(4) +14\` isolate the terms with the variable x

`(5x)/(2) -(3x)/(4) =14-(7)/(2)` get the same denominator and combine like terms

`(10x-3x)/(4) = (28-7)/(2)` solve

`(7x)/(4) =(21)/(2)` crossmultiply and solve for x

`x=(4*21)/(7*2) =6` so is not the first option

try second

`(5x)/(4) -9=(3x)/(2) -12` same steps as before

`(5x-6x)/(4)=9-12\`

`(-x)/(4) =(-3)/(1)` so x=12 not the second option

try third option

`(5x)/(4) -2=(3x)/(2) -4`

`(5x-6x)/(4) =2-4`

`(-x)/(4) =(-2)/(1)` so x=8

Answer 2

C.

Explanation:

5/4x-2=3/2x-4

5/4x-3/2x = -4+2

(multiply both sides by 4)

5x-6x=-16+8

-x=-8

(multiply by -1)

x=8