385 + 637 = ?
1,022
34, 37, 40, 43, ?
46
4x = 24 x = ?
x = 6
4x + 3x = 28 x = ?
x = 4
x + y = 12
x - y = 6
x = ? y = ? (Yoselina)
x = 9 y = 3
8,014 - 3,916 = ?
4,098
100, 94, 88, 82, ?
76
-3y = -15 y = ?
y = 5
12y - 8y = 20 y = ?
y = 5
x + y = 20
x - y = 5
x = ? y = ? (Elean)
x = 15 y = 5
27 x 8 = ?
216
-10, -15, -20, -25, ?
-30
x - 6 = 15 x = ?
x = 21
6(x + 1) = 30 x = ?
x = 4
x + y = 28
x - y = 12
x = ? y = ? (Karina)
x = 20 y = 8
52 x 39 = ?
2,028
100, 130, 160, 190, ?
220
5x + 12 = 37 x = ?
x = 5
-2(y + 3) = -12 y = ?
y = 3
x + y = 20
x - y = 4
x = ? y = ? (Mauricio)
x = 12 y = 8
168 รท 12 = ?
14
12, 8, 4, 0, ?
-4
x/3 + 2 = 6 x = ?
x = 12
2x + 5x + x + 3x = 44 x = ?
x = 11
x + y = -3
x - y = -7
x = ? y = ? (Haseena)
x = -5 y = 2