Question

$2x + 3y = 90 \\ x - y = - 5 \\ solve \: the \: question \: by \: crammers \: rule$
determinant method​

Answer 1

Answer:

The general method to obtain the determinant of a 3x3 matrix consists of breaking down the matrix into secondary matrices of smaller dimensions in a process called "expansion of the first row

Step-by-step explanation:

Evaluate the determinant D, using the coefficients of the variables.

Evaluate the determinant. D x . D x . ...

Evaluate the determinant. D y . D y . ...

Find x and y. x = D x D , x = D x D , y = D y D y = D y D.

Write the solution as an ordered pair.

Check that the ordered pair is a solution to both original equations.

this is how to solve a sum with steps

hope it helps you