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Practice - Algebra Expressions and Equations - 07

Hello KS3 Students! Gearing up for some mathematical magic? Well, get ready to embark on a brain-stimulating journey into the world of Algebra. This quiz will test your understanding of Algebraic Expressions and Equations. Show us your skills to simplify, evaluate and solve. Good luck with this algebraic adventure!
1 .
If 'a' stands for 6, what is the value of 2a + 3?
21
15
18
12
Substitute 'a' with 6: 2(6) + 3 = 12 + 3 = 15
2 .
Simplify: 6(2y - 3)
12y - 3
12y - 9
6y - 18
12y - 18
Use the distributive property of multiplication over addition: 6 x 2y - 6 x 3 = 12y - 18
3 .
Solve for y: 3y + 2 = 14
6
4
5
3
Subtract 2 from both sides: 3y = 12, then divide by 3: y = 4
4 .
If t = 5, evaluate 4t2 - 3
103
97
100
95
Substitute t with 5: 4 x 52 - 3 = 4 x 25 - 3 = 100 - 3 = 97
5 .
What is the value of 2a + 3b - c if a = 3, b = 4, and c = 2?
14
12
15
16
Substitute the values: 2(3) + 3(4) - 2 = 6 + 12 - 2 = 16
6 .
Simplify: 4x + 5x
9x
20x
x9
9
Combine like terms: 4x + 5x = 9x
7 .
Solve for x: 3(2x - 4) = 18
5
6
4
3
First simplify: 6x - 12 = 18, then add 12 to both sides: 6x = 30, and finally, divide by 6: x = 5
8 .
Find x from the equation 2x - 5 = 9
8
7
6
5
Add 5 to both sides: 2x = 14, then divide by 2: x = 7
9 .
Simplify: n4 × n2
n6
n2
n8
2n6
When multiplying with like bases, you add the exponents: n4+2 = n6
10 .
Simplify: 12a - 7a + 3a
8a
7a
18a
15
Combine like terms: 12a - 7a + 3a = 8a
Author:  Graeme Haw

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