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2x + 7 + 2x = 23 4x + 7 = 23 4x = 16 x = 16/4 x = 4
2x + 5 = 13 2x = 8 2x/2 = 8/2 x=4
2X - 3 = 13 add 3 to each side 2X = 16 divide both sides by 2 X = 8 check 2(8) - 3 = 13 13 = 13 checks
2x+3=23 minus 3 from both sides 2x=23-3 so we get 2x=20 divide both sides by 2 to get the value of x x=10
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