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Answer:
x=7
Step-by-step explanation:
8x-17+5x-3=71
13x-20=71
13x=91
x =7
Answer:
y = 3x-13/2
Step-by-step explanation:
We have a slope and a point
The equation of a line is
y= mx+b where m is the slope and b is the y intercept
y = 3x +b
Substitute in x and y
-1/2 = 3(2) +b
-1/2 = 6+b
Subtract 6 from each side
-1/2 -6 = 6-6+b
-1/2 -12/2 =b
-13/2 =b
Putting this back into the original equation
y = 3x-13/2
The number is 20. 20+10 (half of 20) + 4 (a fifth of 20) = 34
