21 x 4 = 84
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x/4 + 5 = -1 (4)x/4 +(4)5 = -1 x+20 = -1 -20 -20 x= -21 x= -21
4 x 21 = 84 = (8 x 10) + (4 x 1)
x-3-7x=21 -6x=21+3 6x=-24 x=-4
You have x+4=25 so you minus the four from four and you minus the four from the 25 . and then you get 21 so it is x=21
1/4 x 21 = 5.25.