Question

Find the sum of 3m, - 5n, 6p and -r and then
find the value of the sum when m = 6,
n=-8, p = 2 and r = 5.​

Answer 1

$\huge \underline{ \underline{ \bf \purple{Solution :}}}$

$\longrightarrow \: \sf3m - 5n + 6p - r$

Here

• m = 6
• n = - 8
• p = 2
• r = 5

Substitute values in given equation

$\longrightarrow \: \sf 3 \times 6 - 5 \times ( - 8) + 6 \times 2 - 5 \\ \\ \longrightarrow \: \sf 18 +40 + 12 - 5 \\ \\ \longrightarrow \: \sf70 - 5 \\ \\ \longrightarrow \: \sf65$