Question

the perimeter of our rectangular yard is 80m. let us now express the following statement into linear equations in two variable and draw graph for them​

Answer 1

Answer:

$2x + 2y = 80 \\ put \: x = 1 \\ 2(1) + 2y = 80 \\ 2 + 2y = 80 \\ 2y = 80 - 2 \\ y = 78 \div 2 \\ = 39 \\ put \: x = 2 \\ 2(2) + 2y = 80 \\ 4 + 2y = 80 \\ 2y = 80 - 4 \\ y = 76 \div 2 = 38 \\ put \: x = 3 \\ 2(3) + 2y = 80 \\ 6 + 2y = 80 \\ 2y = 80 - 6 \\ y = 74 \div 2 = 37$