Question

If a=-8,b =-7,c =6 verify that (a+b) +c =a+(b+c)?

Answer 1

a=-8  b=-7 c=6

(a+b)+c = (-8-7)+6 = -15+6 = -9
a+(b+c) = -8+(-7+6) = -8-1  = -9

(a+b)+c=a+(b+c)

Answer 2

$\huge{\underline{\mathfrak{Solution:}}}$

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$\sf{\large{\underline{\underline{Given \colon}}}}$

$\sf a = -8 \\ \sf</p><p></p><p>b = 7 \\ \sf</p><p></p><p>c = 6$

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$\sf{\large{\underline{\underline{To \: Prove \colon}}}}$

$\sf ( a + b ) + c = a + ( b + c )$

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$\sf{\large{\underline{\underline{Prove \colon}}}}$

$\because\sf ( a + b ) + c = a + ( b + c ) \\ \sf \to ( - 8 + 7) + 6 =- 8 + (7+ 6 ) \\ \sf \to - 1 + 6 = - 8 + 13 \\ \to \boxed{\boxed{\sf 5 = 5}} \\ \sf \therefore LHS = RHS \\ \\ \sf \boxed{ \boxed{\blue{ \sf Hence \: Proved...... }}}$

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