Sovle for n

n-20=4-3n

n = 1

Step-by-step explanation:

Add 20 to both sides, obtaining

n = 4 - 3n

Next, add 3n to both sides:

4n = 4

Finally, solve for n by dividing both sides by 4:

n = 1

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b