Can someone help me and explain the answer to this problem: Jay's dog outgrew his rectangular pen that measured 10 feet by 14 feet. To make it larger, he increased each side length by the same amount, which increased the pen's area by 81 square feet. What is the greater side length of the larger pen in feet?

ok so first lets find the original area which is just lenth*width

10*14=140

so they increace it by 81 so

140+81=221

then we just need to find what they increases the side by we know its the same so lets just say that x so

(10+x)(14+x)=221

x=3

so the longest time is 17 since 14+3=17

Hope This Helps!!!

what does x eaqual

step-by-step explanation: