1) The variable x represents a value in the set ( 4, 6, 7, 8). Which value of x makes 2 (x-4) +3 =7?

x=6

Step-by-step explanation:

2 (x-4) +3 =7

Subtract 3 from each side

2 (x-4) +3-3 =7-3

2(x-4) =4

Divide each side by 2

2(x-4)/2 = 4/2

x-4 = 2

Add 4 to each side

x-4+4 =2+4

x=6

Complete question :

The expression 12g gives the number of kilometers a car can travel using g liters of gasoline.How far can this car travel on 6 1/2 liters of gasoline

78 km

Step-by-step explanation:

12g = Number of kilometers traveled using g litres of gasoline. - - - (1)

The expression shows that:

Kilometers per gallon = 12

Number of gallons used = miles per gallon * distance

Distance that can be traveled on a 6 1/2 lites of gas :

Here, g = 6 1/2

Substituting the value of g into the expression Given :

Distance = 12g

g = 6 1/2

Distance = 12(6 1/2)

Distance = 12(13/2) = 12(6.5)

Distance = 78 km