X x 27 + X x 30 +X x 43=210500
X x ( 27 + 30 + 43) =210500
X x 100 =210500
X =210500 : 100
X =2105
128 x X - 12 x X -16 x X=5208000
( 128 - 12 - 16 ) x X =5208000
100 x X =5208000
X =5208000 : 100
X =52080
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Câu 1:
X ×(27+30+43)=210500
X × 100=210500
X = 2105
Câu 2:
X ×(128- 12 -16)=5208000
X ×100=5208000
X= 52080