1) 5•(a+2)-9=64
5a + 10 – 9 = 64
5a = 64 + 9 – 10
5a = 63
a = 12.6
2) 2•(3x+1)-3=11
6x + 2 – 3 = 11
6x = 11 + 3 – 2
6x = 12
x = 2
3)17•(5x-3)-34=1700
85x – 51 – 34 = 1700
85x = 1700 + 34 + 51
85x = 1785
x = 21
4) 6•(3x+6)+22=2344
18x + 36 + 22 = 2344
18x = 2344 – 22 – 36
18x = 2286
x = 127
1) 5•(a+2)-9=64
5a + 10 – 9 = 64
5a = 64 + 9 – 10
5a = 63
a = 12.6
2) 2•(3x+1)-3=11
6x + 2 – 3 = 11
6x = 11 + 3 – 2
6x = 12
x = 2
3)17•(5x-3)-34=1700
85x – 51 – 34 = 1700
85x = 1700 + 34 + 51
85x = 1785
x = 21
4) 6•(3x+6)+22=2344
18x + 36 + 22 = 2344
18x = 2344 – 22 – 36
18x = 2286
x = 127