SOLUTION: a line has equation y=3x+7 and passes through the point(h,h+15).calculate the value of h?

Question 762891: a line has equation y=3x+7 and passes through the point(h,h+15).calculate the value of h?
Found 2 solutions by sachi, Cromlix:
Answer by sachi(548) (Show Source): You can put this solution on YOUR website!
y=3x+7 and passes through the point(h,h+15)
so h+5=3h+7
or 3h-h=5-7
or 2h=-2
or h=-1
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
y = 3x + 7
Substituting h for x
Substituting h + 15 for y
h + 15 = 3(h) + 7
h + 15 = 3h + 7
-2h = -8
h = 4
x = 4
y = 19
Hope this helps.
:-)
RELATED QUESTIONS
The following equation represents the line that passes through (2h, h+1) and (h+3, 0) and (answered by josgarithmetic)
The tangent line to the graph of y = h(x) at the point (-1, 7) passes through the point... (answered by Boreal)
A line with a slope of 7 passes through the points (-8,h) and (-9,3). What is... (answered by Fombitz,josmiceli)
A line passes through the points (3, 16), (-2, -14), and (h, 28). Find the value of... (answered by josmiceli)
a straight line with equation 2y = kx + h passes through the points (-3,6) and ( 1,11)... (answered by Fombitz)
a straight line with equation 2y = kx + h passes through the points (-3,6) and ( 1,11)... (answered by josgarithmetic,MathLover1,MathTherapy,ikleyn)
HELP !!! I NEED UR HELP !! A straight line with equation 2y=kx+h passes through the... (answered by josmiceli)
Write the equation of the line that passes through the point H(0,-9) and is parallel to... (answered by josgarithmetic)
Write and graph an equation for the parabola that has vertex (-1, 3) and passes through... (answered by lwsshak3)