well, you have to combine the like terms so put the X's together 3X + 2X = 5X and then add the left over numbers together so; 3 + 10 = 13. So you have made the sum easier now it is 5X + 13. You haven't displayed the answer to this question so i cannot work out the rest for you, but what you have to do for example say the answer was: 133, you do 133 - 13 = 120 then divide 120 by 5 = 24 so the example answer would be 24.
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Depending on how the problem is written. 2x + 3 - 5x + 10 -3x + 13 ■ Or... 2x + 3 - (5x + 10) -3x - 7 ■ I think you want the second answer.
2x+3 = 3x+5 2x-3x = 5-3 -x = 2 x = -2
2x+3=3x-3 2x-3x=-3-3 -x=-6 x=6
3x+4 = 2x-3 3x-2x = -3-4 x = -7
(4, -1)