Problema Solution
find the value of x so that the line that passes through the points (x/2,7),(-10,15) has a slope of 4
Answer provided by our tutors
The general equation of line is:
y = mx + b, where m is the slope, and b is the y-intercept
m = 4
y = 4x + b
Since it goes trough (-10,15) we have for x = -10, y = 15, that is:
4*(-10) + b = 15
........
click to see the equation solved for b
........
b = 55
The equation of the line is:
y = 4x + 55
The line goes trough (x, 27) means:
4x + 55 = 27 for some value of x
........
click here to see the equation solved for x
........
x = - 7
The value of x is -7.