Can someone tell me how to do number 15 !

x = 90

c = 11

d = 11

Step-by-step explanation:

For this, we just need to use algebra to solve for x.

(x / 3) - 4 = 26 | First we add 4 to both sides

x / 3 = 30 | Then we multiply both sides by 3

x = 90.

For the others, it's the same.

-8 + 10c = 102 | Subtract -8 from both sides, or add 8

10c = 110 | Divide both sides by 10

c = 11

2.5d + 7.5 = 20 | Subtract 7.5 from both sides

2.5d = 27.5 | Divide both sides by 2.5

d = 11

just do 5.2 + 2 ( 7.2) and 1/3 x 3 (.9) and youv'e got your equation. 0.9( 9/10) + 7.2 ^2 = 16.4 hope i could !

step-by-step explanation:

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6