8 plus 15 = 23
45 + 8 - 23 + 2 = 32
(-15) + 23 = 8
23
42
78 - without the aid of a calculator !
you just add eight and the answer is 5
The answer is 156. Simply add the numbers together like you would for two plus two. To check your work, a calculator is the best option.
6754
It is the property that equals plus equals are equals.
The answer is 23. Simply add the numbers together as you would 2+2 to get the answer. You can use a calculator to check your work.
9x + 8 = 4x + 23Subtract 8 from both sides9x = 4x + 15Subtract 4x from both sides5x = 15Divide both sides by 5x = 3