7x + 5 = 68
subtract 5 from both sides
7x = 63
divide both sides by 7
x = 9
68
68 + 28x - 28 = 236 28x + 68 - 68 -28 + 28 = 236 - 68 + 28 28x = 196 x = 7
68
68 + 59 = 127
49 + 72 + 68 = 189
24.38
768
68
Some thing
34+34=68
28 + N = 68 Subtract 28 from each side: N = 40
The answer is 168. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.