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Earn +20 ptsQ: What is y equals 8-2x?
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What is the answer to x plus y equals 8 and 2x-y equals 5?
x + y = 82x - y = 5-------------------- add together to eliminate y3x = 13x = 13/3Substitute for x in one of the original equations:(13/3) + y = 8y = 24/3 - 13/3y = 11/3x=13/3 & y=11/3
11x-28 equals 82 x equals what?
Solving 11x-28=82x for x involves the following: -28=82x-11x -28=71x -28/71=x x=.3943 (truncated to 4 decimal places)
2x plus 1 equals 8?
2x + 1 = 82x = 7x = 7/2 = 3.5whew !
X plus 36 equals 82 what is x?
x + 36 = 82x = 82 - 36x = 46
What are the two numbers if the sum of two numbers is 82 and the difference is 36?
x = 59y = 23Let:x = the first numbery = the second numberx + y = 82 -- equation (1)x - y = 36 --- equation (2)By Elimination:x + y = 82x - y = 36=========2x = 118 2x/2 = 118/2x = 59x + y = 82y = 82 - xy = 82 - 59y = 23check:x - y = 3959 - 23 = 3636 = 36Let x = 1st numberlet y = 2nd numberX + Y = 82X - Y = 36add above equations2X = 118X = 59Y = 23
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