2y+7y=-20 You first add common numbers/variables So you add 2y to 7y=9y 9y=-20 You divide -20 by 9y=-2 9 2 y=2 9 2
2y + 7y = -20 :First combine like terms (2y and 7y)
9y = -20 :Then, divide the whole equation by 9
y = -2.22
or
y = -22/10
or
y = -11/5
or
y = -2 1/5
To find y in the equation 2 y + 7 y = − 20 , combine like terms to get 9 y = − 20 and then divide by 9 to find y = − 9 20 .
;