Elementary Algebra - Substitution & Solving

What is the operation of the following expression?   x/5

• multiplication 
• addition 
• subtraction 
• division 

Define substitute.

• the number multiplied by a variable

• to replace a variable with a value or an expression

• a number standing alone

• to find the value of an expression

There are m strawberries in a box. How many strawberries will there be in total if you add 1 more?

• 1m
• m x 1
• m + 1
• 2m

This piece of string is 30 cm long. If Sarah cuts off p cm from one end, what length is left?

• 30 - p
• 30 + p
• 30/p
• 30 - 2p

N + 6= 12, What is N

• 4

• 5

• 6

• 7

29 - q = 13

• q = 17

• q = 16

• q = 42

• q = 13

If a = 4 b = 6, what is 2a + 6b?

• 40

• 42

• 44

• 90

If x=5,find the value of 7x-1

• 34
• 36
• 35

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
2a

• 5
• 6
• 8
• 10

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
3ab

• 10
• 12
• 15
• 36