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emocow
06.08.2019 •
Mathematics
Type the correct answer in each box. spell all words correctly, and use numerals instead of words for numbers. if necessary, use / for the fraction
bar(s).
x + 3
a
e
4
aabc and afde are congruent by the
(blank)
criterion. (use the three-letter abbreviation without spaces.)
the value of x is
, and the value of y is
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Ответ:
2(-x - 3y = -14) = -2x - 6y = -28 , I multiplied this equation by 2 to get the y value to cancel with the y value of the previous equation
3x + 6y = 27
+ 2x - 6y = -28
5x = 55
x = 55/5
x = 11
Then plug the 11 into one of the equations to solve for y.
x + 2y = 9
(11) + 2y = 9
2y = 9 - 11
2y = -2
y = -2/2
y = -1
hope this helps :)