if a= 1/4 b = -3/5 c= 5/7 then verify a+ (b+ c)= (a+b)+c
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Answer:
a+(b+c) = 1/4 + ( -3/5 +5/7)
= 1/4 + (-3×7+5×5/35)
= 1/4 + ( -21+25 /35)
= 1/4 + 4/35
= 1×35 + 4×4 / 140
= 35+16/140 = 51/140
(a+b)+c =( 1/4 -3/5 )+5/7
=( 1×5-3×4/20) +5/7
= (5-12/20)+5/7
= (-7/20+5/7)
= -7×7+5×20/140
= -49+100/140
=51/140
LHS = RHS = 51/140
Step-by-step explanation:
a
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