1) 5x + 3(3x + 7) = 35x + 9x + 21 = 314x + 21 = 314x = 35 - 214x = 1x = 1
2) 8y - 9 - (4y - 5) = 12y - (4 + 5y8y - 9 - 4y + 5 = 12y - 4 - 54y - 4 = 7y - 4y - 7y = 4 - -3y = y = 0
1) 5x + 3(3x + 7) = 3
5x + 9x + 21 = 3
14x + 21 = 3
14x = 35 - 2
14x = 1
x = 1
2) 8y - 9 - (4y - 5) = 12y - (4 + 5y
8y - 9 - 4y + 5 = 12y - 4 - 5
4y - 4 = 7y -
4y - 7y = 4 -
-3y =
y = 0