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x-14=99 x=85 (I subtracted 14 from each side of the equation).
(4+5) - (2 x 3) = 3
No.Two matrices A and B can be added or subtracted if and only if they have the same number of rows and columns. That is a 3 x 2 matrix can be added or subtracted only with another 3 x 2 matrix.
A number: x (or any other convenient letter) Difference: use the minus sign, therefore x - 14 Triple this difference: 3(x-14)