if you can't do all of them it's ok but if you do some put which number it is. also write it like 11). x = 7 (not real answer).

1. x=11

Step-by-step explanation:

For the rest of the questions to do inverse operation! it says x+7=18 ask yourself 7 plus what give me 18 use a calculator or paper subtract 18 from 7 and it gives you your answer which is 11.

For the ones like number 4. You do the same thing but instead of subtracting you add 6+3 it will give you 9 and to make sure sure add the numbers together. what ever number you get you plug the number into your equation and the statement should be true.

answer: 5100 just subtract

step-by-step explanation:

a is 8.b is 10.c is 10.5. d is -.5

step-by-step explanation:

just minus the smallest number from the biggest.