Evaluate: 35b – (16b + 9b) - Mathematics

Evaluate:

35b – (16b + 9b)

Sum

35b – (16b + 9b) = 35b – 25b = 10b

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Concept of Substitution

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Chapter 20: Substitution (Including Use of Brackets as Grouping Symbols) - Exercise 20 (B)

Chapter 20 Substitution (Including Use of Brackets as Grouping Symbols)
Exercise 20 (B) | Q 1.5

Fill in the blank, when:
x = 3, y = 6, z = 18, a = 2, b = 8, c = 32 and d = 0.

a − b + y = ................

Find the value of 5x + 3y − 6z, when x = 3, y = 5 and z = 4

Find the value of 4pq × 2r, when p = 5, q = 3 and r = 1/2

Show that the value of x³ – 8x² + 12x – 5 is zero, when x = 1.

Simplify:

2 (3a − b) − 5 (a − 3b)

Fill in the blank:

3x − z + y = 3x − (..............)

Insert the bracket as indicated:

ab + 2bc − 3ac = 2bc − (...............)

If x = 3, y = 2 and z = 1; find the value of xy + y²z – 4zx

If P = − 12x² – 10xy + 5y², Q = 7x² + 6xy + 2y², and R = 5x² + 2xy + 4y²; find P – Q + R

Simplify:

2 (3x² – 4x – 8) – (3 – 5x – 2x²)