Substitution into expressions

If x=4, find the value of 3x-2

• 6

• 8

• 7

• 10

If p=2 and q=3, find the value of 3p-q

• 3

• 6

• 9

• 12

If m=2, n=3 

 find the value of

 $\frac{7m+2n}{5}$  

• 4

• 4.5

• 3.5

• 5

If x=4 and y=8

find the value of 3x+2y

• 22

• 29

• 28

• 26

(k=5 and j=12)

show the value of of 3k-4j

• 33

• 37

• -22

• -33

Help Celine solve this question. 
 a= -2 and b=6 find the value of 2a + 3b

• 12

• 16

• 13

• 14

Given x=20 and y=2

find the value of x/2 + 4y

• 20

• 19

• 18

• 22

Given x=4, y=7 and z=2

find the value of x²+ 7y+ 5z

• 75

• 1

• 78

• 73

Given k=4 and p=3

find the value of 4k+9p

• 40

• 53

• 31

• 43

Given j=6 and L=4
find the value of 4j-3L

• 12

• 21

• 16

• 7