Work:
$3 x 7 = $21
$5.50 x 7 = $38.50
$38.50 + $21= $59.50
Derek spend $59.50 in a week.
J/-2 + 7 = -12 multiply both sides with 2
-j + 14 = -24 move -14 to the other side and change sign
-j= -24 - 14
-j = -38 and if you divide -38 with -1 you get + 38
j=38
