# SIMPLFY BY COMBINING LIKE TERMS

Simplify combining like terms :

Problem 1 :

21b – 32 + 7b – 20b

Solution

Problem 2 :

–z2 + 13z2 – 5z + 7z3 – 15z

Solution

Problem 3 :

p – (p – q) – q – (q – p)

Solution

Problem 4 :

3a – 2b – ab – (a – b + ab) + 3ab + b – a

Solution

Problem 5 :

5x2y – 5x2 + 3yx2 – 3y2 + x2 – y2 + 8xy2 – 3y2

Solution

Problem 6 :

(3y2 + 5y – 4) – (8y – y2 – 4)

Solution

Problem 7 :

3mn, -5mn, 8mn, -4mn

Solution

Problem 8 :

t – 8tz, 3tz – z, z - t

Solution

Problem 9 :

-7mn + 5, 12mn + 2, 9mn – 8, -2mn - 3

Solution

Problem 10 :

a + b – 3, b – a + 3, a – b + 3

Solution

Subtract the following :

Problem 11 :

-5y2 from y2

Solution

Problem 12 :

6xy from -12xy

Solution

Problem 13 :

(a – b) from (a + b)

Solution

Problem 14 :

a(b – 5) from b(5 – a)

Solution

Problem 15 :

-m2 + 5mn from 4m2 – 3mn + 8

Solution

 1) 8b - 32 2) 7z3 + 12z2 – 20z 3) p - q 4) a + ab 5) 8x2y – 4x2 + 8xy2 – 7y2 6) 4y2 – 3y 7) 2mn 8) – 5tz 9) 12mn - 4 10) a + b + 3 11) 6y2 12) -18xy 13) 2b 14) 5(a + b) – 2ab 15) 5m2 – 8mn + 8

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