Answer:
Value of NP is ER+7
Explanation:
Given ER + LM = NP then we have to find NP.
Substitution property of equality states that if a=b, then a can be substituted as b in any of given equation and b can be substituted as a in any equation.
If LM = 7 and ER + LM = NP
then by applying Substitution property of equality, LM is substituted as 7 in equation ER + LM = NP
⇒ ER+7=NP
Hence, value of NP is ER+7