Question

Can somebody check my answers posted below.

Solve: 3x – 5 = 7x - 21
3x-5=7x-21
(3x-7x)-5=(7x-7x)-21
-4x -5= -21
-4x (-5+5)= (-21+5)
-4x= -16
-4x/-4= -16/-4
x=4

Given the linear equation x + 2y = 5, find the slope of its graph.
4+2*0=5
4+0=5
4=5 4/5

Given the linear equation 4y + 6x =12, find the y-intercept.
4*0+6*4=12
0+24=12
24=12 24/12

Answer 1

@DawnStar53
u solved the first part correctly
for the second part and third part
u need to apply slope intercept form

Answer 2

for second one you just have to solve for y
and same with third one

Answer 3

Ok

Answer 4

The first answer looks correct, but the second and third do not. To find the slope of the graph, do not replace a variable with a number, simply move everything around to get the equation in the form \[y = mx+b\] and the 'm' will be your slope (whatever is directly in front of the 'x').
For the third, simply replace the 'x' variable with a zero and solve for 'y', giving you the answer (0, y-value) for the y-intercept.