4y + 7 = 19 ∴ 4y = 12 ∴ y = 3
"3y + 4y = 19" is a mathematical sentence involving one unknown, y. If you wanted it solved (ie you meant to ask; "What is y in 3y plus 4 y equals 19"), then: 3y + 4y = 19 → (3 + 4)y = 19 → 7y = 19 → y = 19/7 = 2 5/7 ≈ 2.71
If: -4y+7 = 35-6 then y = -5.5
No, it is not.
(-1, 5)
(-1, 5)
(1, 1)
4y + 10 = -18 4y = -28 y = -7
y=(7-x)/4
They are parallel lines.
(5,3)
No. They are parallel.