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2X + 5X + 4 = 25

add the X terms together

7X + 4 = 25

subtract 4 from each side

7X + 4 - 4 = 25 - 4

7X = 21

divide both sides integers by 7

(7/7)X = 21/7

X = 3

----------check in original equation

2(3) + 5(3) + 4 = 25

6 + 15 + 4 = 25

25 = 25

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Q: What is 2x plus 5x plus 4 equals 25?
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