Set up the equation 120+20x=500. So x=19
7.7 is the greater decimal
8+2x=5x-22
-2x -2x
8=3x-22
+22 +22
30=3x
3x=30
x= 30/3
x=10
11y - 22 + 3y = -7y + 14
*combine like terms*
14y - 22 = -7y + 14
21y = 36
y = 36/21 = 12/7 or 1 5/7
hope this helps :)
Answer:
slope = -1
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4x+4y=8 is equivalent to y=-x+2, so -x (slope) is equivalent to -1x
