PEMDAS says to divide first then add
So
64/4=16
16+7=23
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7y+ 8x + 4= 20 + 8x- 8x - 8x7y + 4 = 20- 4 - 47y=16/7 /7y= 2.28the /7 means divide by 7 :)
(51/3) / (13/4) = (16/3) / (7/4) = (16/3) * (4/7) = 64/21
divide both by the highest factor (8 in this case) answer is 8 over 7
7*8+(1/5)*20+211 = 7*8+4+211 = 56+4+211 = 271
3n + 4 = 7(- 4 from both sides)3n = 3(divide both sides by 3)n = 1