Question 246646
y= -4x - 7
Since y = 3x we can write the 1st equation:
3x = -4x - 7
add 4x to each side
3x + 4x = -7
7x = -7
Divide both sides by 7
x = {{{(-7)/7}}}
x = -1
:
Find y:
y = 3x
y = 3(-1)
y = -3
:
Check solution in 1st equation, substitute for x and y
y = -4x - 7
-3 = -4(-1) - 7
-3 = +4 - 7
:
x is the independent variable
y is the dependent variable