Solution of system of linear equations using linear map equation

Let A=[2300]A=\begin{bmatrix} 2 & 3 \\ 0 & 0 \end{bmatrix}. Then for which B the matrix equation AX=B is consistent
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Let A=[020010]A=\begin{bmatrix} 0 & 2 & 0 \\ 0 & 1 & 0 \end{bmatrix}. Then for which B the matrix equation AX=B is inconsistent
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Consider the consistent matrix equation AX=B, where A is a 2×3 and B is a column matrix of order 2×1. Let T:R^3→R^2 be the linear transformation w.r.t. the standard basis associated with the matrix A. Then
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Consider the consistent matrix equation AX=B, where A is a 2×3 and B= 0 0. Let T:R^3→R^2 be the linear transformation w.r.t. the standard basis associated with the matrix A. Then
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Consider a system of linear equations represented by AX=B, where A is an invertible matrix of order n×n. Then the system has
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Consider the system of two linear equations in three variables given by x1+x2=3x_1+x_2=3 and x1+x2+x3=0x_1+x_2+x_3=0. Then
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Consider the system of three linear equations in two variables given by x1+x2=3,x12x2=6x_1+x_2=3, x_{1}-2x_2=-6 and x1+3x2=6x_1+3x_2=6. Then
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