om2gyReite3ell om2gyReite3ell

03-10-2016
Mathematics

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Which equation is an identity a; -3y 3=-3y-6b; 3w 8-w=4w-2(w-4)c;9-(2v 3)=-2v-6d; 7m-5=8m 7-m?

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nobillionaireNobley nobillionaireNobley

09-10-2016

3w + 8 - w = 4w - 2(w - 4)
2w + 8 = 4w - 2w + 8
2w + 8 = 2w + 8
0 = 0

Therefore, option b is an identity.

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