SOLUTION: If the number of degrees in the measure of one angle of a triangle is represented by 4x and the measure of a second angle is represented by y, what expression would represent the m
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Question 227616: If the number of degrees in the measure of one angle of a triangle is represented by 4x and the measure of a second angle is represented by y, what expression would represent the measure of the third angle?
My answer
1st angle = 4x
2nd angle = y
I’ll let x represent the 3rd angle
4x + (y + x) = 180
4x + y + x = 180 (-4x) + y I added 4x to both sides
+4x +4x
8x + y + x=180 + y I added -y to both sides
-y -y
8x + x = 180 I added 'x' to 8x
9x = 180 I divided both sides by 9
9 9
x=20
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