Hong Kong

Stage 2

By substituting into the equation, identify whether the following statements are true or false.

a

$x=6$`x`=6 is a solution for the equation $8x=51$8`x`=51.

True

A

False

B

b

$x=4$`x`=4 is a solution for the equation $2x=2\times4$2`x`=2×4.

True

A

False

B

c

$x=19$`x`=19 is a solution for the equation $\frac{x}{2}=8$`x`2=8.

True

A

False

B

d

$x=24$`x`=24 is a solution for the equation $\frac{x}{3}=8$`x`3=8.

True

A

False

B

Easy

Approx a minute

We want to solve this equation for $x$`x`.

What operation can we apply to the equation $x-5=4$`x`−5=4 so that $x$`x` is by itself?

When $10$10 is added to a number, the result is $12$12. What is the number?

When a number is multiplied by $10$10, the result is $60$60. What is the number?

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