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True or false:
If a×b=a×c \color{#D61F06}a\times \color{#3D99F6}b = \color{#D61F06}a\times \color{#20A900}c a×b=a×c, then b=c\color{#3D99F6}b = \color{#20A900}c b=c must be true.
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