X x 7 + X x 9 - X - X x 5 = 790
X x 7 + X x 9 - X x 1 - X x 5 = 790
X x ( 7 + 9 - 1 - 5 ) = 790
X x 10 = 790
X = 790 : 10
X = 79
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X x 7 + X x 9 - X - X x 5 = 790
X x 7 + X x 9 - X x 1 - X x 5 = 790
X x ( 7 + 9 - 1 - 5 ) = 790
X x 10 = 790
X = 790 : 10
X = 79
X*7+X*9-x-X*5=790
x * 7 + x * 9 - x - x 5 = 790
X*7+X*9-X-X*5=790
X*7+X*9-X-X*5= 790
x*7+x*9-x-x*5=790. Tìm x.
tìm x biết : X x 7 + X x 9 - X - X x 5=790
(X x 7)+(X x 9) - X -(X x 5)=790
X=?
x*7+x*9-x-x*5=790
x=?
Tìm x biết : x * 7 +x * 9 - x - x * 5 = 790