<em><u>Answer:</u></em>
<em><u>Answer: y = 21 </u></em>
<em><u>Answer: y = 21 when x = 7</u></em>
<em><u>Answer: y = 21 when x = 7so x = 28 </u></em>
<em><u>Answer: y = 21 when x = 7so x = 28 then y = 84</u></em>
<em><u>Answer: y = 21 when x = 7so x = 28 then y = 84Step-by-step explanation:</u></em>
<em><u>Answer: y = 21 when x = 7so x = 28 then y = 84Step-by-step explanation:y = 84 = 21 × 4</u></em>
<em><u>Answer: y = 21 when x = 7so x = 28 then y = 84Step-by-step explanation:y = 84 = 21 × 4x = 28 = 7 × 4</u></em>