52x+72x=56−2x, find 'a' when 2a3+3x4=1
-51/8
43/8
30/7
-26/7
52x+72x=56−2x⇒52x+72x+2x=56⇒5x+7x+4x2=56⇒16x=56×2⇒x=56×216=7Now, 2a3=1−3x4⇒2a3=1−3×74⇒2a3=4−214=−174⇒8a=−51⇒a=−518
Given, 52x+72x=56−2x Find 'a' when 2a3+3x4=1