Question

The product of 7 and a number is at least 30

Answer 1

Let x be the number multiplied by 7.

We get 7x.

At least 30 means GREATER THAN OR EQUAL TO 30 or ⩾ 30.

Put it all together now.

7x ⩾ 30

Divide both sides by 7.

x ⩾ 30/7

Done!