This is false for example, the GCF of 13 and 26 is 13, an odd number.
400 reduced by 4 times my age is 116...
400 - 4x = 116
-4x = 116 - 400
-4x = - 284
x = -284/-4
x = 71 <===
Surface area = 2(19 x 15) + 2(15 x 13) + 2(13 x 19)
Surface area = 570 + 390 + 494
Surface area = 1454 cm²
---------------------------------------------
Answer: Surface area = 1454 cm²
---------------------------------------------
