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iVinArrow [24]
3 years ago
8

If twice a number is increased by 5 and this sum is multiplied by -3, the result is -57 . What is the number?

Mathematics
1 answer:
cupoosta [38]3 years ago
6 0
Set it up like this, going from words on the page to letters and variables:
-3(2x+5) = -57. Twice a number is 2x, increased by 5 is 2x+5, and that is multiplied by -3 to get a total of -57. Distribute the -3 into the parenthesis to get -6x - 15 = -57. Move the 15 over by addition to get -6x = -42. Divide both sides by -6 to get that x = 7
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