1) 5x + 3(3x + 7) = 355x + 9x + 21 = 3514x + 21 = 3514x = 35 - 2114x = 14x = 1
2) 8y - 9 - (4y - 5) = 12y - (4 + 5y)8y - 9 - 4y + 5 = 12y - 4 - 5y4y - 4 = 7y - 44y - 7y = 4 - 4-3y = 0y = 0
1) 5x + 3(3x + 7) = 35
5x + 9x + 21 = 35
14x + 21 = 35
14x = 35 - 21
14x = 14
x = 1
2) 8y - 9 - (4y - 5) = 12y - (4 + 5y)
8y - 9 - 4y + 5 = 12y - 4 - 5y
4y - 4 = 7y - 4
4y - 7y = 4 - 4
-3y = 0
y = 0