1)5x+3(3x+7)=35
5x + 9x + 21 = 35
5x + 9x = 35 – 21
14x = 14
x = 1
2)8x-(7x+8)=9
8x – 7x – 8 = 9
8x – 7x = 9 + 8
x = 17
3)8y-9-(4y-5)=12y-(4+5y)
8y – 9 – 4y + 5 = 12y – 4 – 5y
8y – 4y – 12y + 5y = – 4 – 5 + 9
y = 0
4)4+8y+8=2y-(10+7y)+9
4 + 8y + 8 = 2y – 10 – 7y + 9
8y – 2y + 7y = 9 – 10 – 8 – 4
13y = -13
y = -1
1)5x+3(3x+7)=35
5x + 9x + 21 = 35
5x + 9x = 35 – 21
14x = 14
x = 1
2)8x-(7x+8)=9
8x – 7x – 8 = 9
8x – 7x = 9 + 8
x = 17
3)8y-9-(4y-5)=12y-(4+5y)
8y – 9 – 4y + 5 = 12y – 4 – 5y
8y – 4y – 12y + 5y = – 4 – 5 + 9
y = 0
4)4+8y+8=2y-(10+7y)+9
4 + 8y + 8 = 2y – 10 – 7y + 9
8y – 2y + 7y = 9 – 10 – 8 – 4
13y = -13
y = -1