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In this paper, we present a solution of an arbitrary general fully fuzzy linear systems (FFLS) in the form A ⊗ x = b. Where coefficient matrix A is an m × n fuzzy matrix and all of this system are elements of LR type fuzzy numbers. Our method discuss a general FFLS (square or rectangle fully fuzzy linear systems with trapezoidal or triangular LR fuzzy numbers). To do this, we transform fully fuzzy linear system in to two crisp linear systems, then obtain the solution of this two systems by using the pseudo inverse matrix method. Numerical examples are given to illustrate our method.

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In this paper, we present a solution of an arbitrary dual fully fuzzy linear systems (DFFLS) in the form A ⊗ x = B ⊗ x ⊕ c, where coefficients matrices A and B are n × n fuzzy matrices, x and c are n × 1 fuzzy vectors and all of this system is elements of LR type of fuzzy numbers. By the transforming dual fully fuzzy linear system into two crisp linear systems, the solution of these two systems is obtained. Numerical examples are given to illustrate our method.