A flight from Melbourne to Sydney was discounted from $500 to $100. By what percentage was it reduced?

100 of 500 is 20%

Step-by-step explanation:

100 of 500 can be written as:

To find percentage, we need to find an equivalent fraction with denominator 100. Multiply both numerator & denominator by 100

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Therefore, the answer is 20%

If you are using a calculator, simply enter 100÷500×100 which will give you 20 as the answer.

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3