2(x+7) + x=20
(2)(x) + (2)(7) + x=20 Distribute
2x+14 + x =20
(2x+x) + (14) =20 Combine Like Terms
3x+14=20
- 14 -14 Subtract 14 from both sides
3x = 6
3x/3 6/3 Divide Both Sides by 3
x = 2
Let me know if you still don't understand
Y = -3x + 4
In y = mx + b form, the y intercept will be in the b position.
y = mx + b
y = -3x + 4......so ur y intercept is 4.....or (0,4)
just so u know....in y = mx + b form, the slope will be in the m position....so ur slope would be -3
