In this lesson, we will explore expressions with two variables and how to interpret them. We will also look at examples involving spending money on combinations of pens and pencils.

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Look at the picture below and then fill in the gap: If the same expression is __________ to two equal quantities, then the two resulting expressions will be equal.

Correct answer: added

added

divided

multiplied

subtracted

Q2.

Look at the picture below and then fill in the gap: If the same expression is ___________ from two equal quantities, then the two resulting expressions will be equal.

added

divided

multiplied

Correct answer: subtracted

subtracted

Q3.

Look at the picture below and then fill in the gap: If two equal expressions are both _____________ by the same quantity, then the two resulting expressions will be equal.

added

divided

Correct answer: multiplied

multiplied

subtracted

Q4.

Look at the picture below and then fill in the gap: If two equal expressions are both __________ by the same quantity, then the two resulting expressions will be equal.

added

Correct answer: divided

divided

multiplied

subtracted

Q5.

If 𝑥 + 𝑦 = 100, then what is the value of 2𝑥 + 2𝑦 - 20?