The sum of a number s and 15 is 25. Write the equation and solve it.
s + 15 = 25
[s = 10]
200
h + -7 = 30
h = 37
200
-5m = 25
m = -5
200
c - 14 = - 5
c = - 19
200
r/6 = -36
r = -6
200
The difference between a number w and -10 is 10. Write the equation and solve it.
w - -10 = 10
{w + (-10) = 10}
[w = 20]
300
q + 18 = -1
q = 17
300
-25p = 100
p = -4
300
92 = d - 100
192 = d
300
144 = m/-12
-12 = m
300
The product of a number q and 4 is -16. Write the equation and solve it.
4q = -16
[q = -4]
400
28 = 6 + z
22 = z
400
144 = 12r
12 = r
400
-22 = y - 13
-9 = y
400
75 = u/15
5 = u
400
The quotient between a number x and 15 is 5. Write the equation and solve it.
x/15 = 5
[x = 75]
500
-135 = n + 3
-138 = n
500
-72 = 9b
-8 = b
500
35 = m - 11
46 = m
500
121 = n/11
11 = n
500
You have 7 pencils. Your friend has some pencils. All together you have 15 pencils. How many pencils does your friend have? Write the equation and solve it.