Simplify and solve each of the following equations. a. 6 + 8x – 2 – 6x = 20 b. 10b – 3b – 5 – 2 = 14 c. 36 = 2r + 6r – 10 + 6 d. 95 = 47 + 4a – 22 + 6a

a. x = 8

b. b = 3

c. r = 5

d. a = 7

Step-by-step explanation:

a. 2x + 4 = 20

2x = 16

x = 8

b. 7b - 7 = 14

7b = 21

b = 3

c. 36 = 8r - 4

8r = 40

r = 5

d. 95 = 25 + 10a

70 = 10a

a = 7

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: