I can't really see what it written on the board one time, when the teacher uses red marker.

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we have got, 3x/2 + 5/2 = 8x/2she uses red markers to cross out all the 2's because u can cross out the denominator as long as it is common.thus, u only get 3x + 5 = 8xor, 5 = 8x - 3x ( subtract 3x on both sides)or, 5 = 5xthus, x = 1

i think that means you need glasses