3.4+2(9.7-4.8x)=61.2
3.4+19.4-9.6x=61.2
22.8-9.6x=61.2
-9.6x=61.2+22.8
-9.6x=84
9.6x=-84
x=-84÷9.6
x=-8.75
0.6 or 18/30 because 9 divided by 15 is .6
The formula for area is length x width
So there is a rectangle with a length of 5 and a width of 9. To find the area you must multiply 5 and 9, which is 45. That's your area.
Now say you have a triangle. That triangle has a length of 46 and a height of 99. Again, l x w. 46 x 99 =4554.
Any other questions, let me know.