3x + 4x + 17 = 24
3x + 4x = 24 – 17
7x = 7
x = 1
8y + 56 + 4y = 80
8y + 4y = 80 – 56
12y = 24
y = 2
11r – 4r – 25 = 24
11r – 4r = 24 + 25
7r = 49
r = 7
18d + 5d – 23 = 23
18d + 5d = 23 + 23
23d = 46
d = 2
3x + 4x + 17 = 24
3x + 4x = 24 – 17
7x = 7
x = 1
8y + 56 + 4y = 80
8y + 4y = 80 – 56
12y = 24
y = 2
11r – 4r – 25 = 24
11r – 4r = 24 + 25
7r = 49
r = 7
18d + 5d – 23 = 23
18d + 5d = 23 + 23
23d = 46
d = 2