Xx2+Xx7+X=420
Xx(2+7+1)=420
Xx10=420
X=420:10
X=42
Vậy X=42.
Xx2+Xx7+X=420
Xx(2+7+1)=420
Xx10=420
X=420:10
X=42
Vậy X=42.
Xx2+Xx7+X=420
Xx(2+7+1)=420
Xx10=420
X=420:10
X=42
Vậy X=42.
Xx2+Xx7+X=420
Xx(2+7+1)=420
Xx10=420
X=420:10
X=42
Vậy X=42.
tìm y
y x 8 +y x2 = 420
109 x y -9 x y = 2300
a, ( 61 + ( 53 - x ) ) x 17 = 1785
b, 420 + 65 x 4 = ( x + 175 ) : 5 + 30
c, 7 nhân x - 24 = 5 nhân x
tìm x
x+1/3=4/5
x-1/2=2/7
4/7×x=1/3
x:2/5=2/9
20×7:(5×x-3×5)=4
x-270=420:105
x-140:35=270
Tìm x :
a) 49 x (X – 21) =441
b) 53 x 31 x X = 4929
c) 61 x ( 126 : X ) = 1281
d) 79 x ( X : 23) = 316
e) X : ( 12 + 13) = 7
g) 429 : (x + 31) = 11
h) 1615 : (X x 19) = 17
i) 420 : ( X : 39) = 105
X*2 +x*3+x*4+x=420
/ x × 2 + x × 3 + x × 4 + x = 420
X x 1 + X x 2 + X x 3 = 900-420
278 x 305 672 x 78 1956 x 420
X x 62 - X x 52 = 420 tính giùm mik tik cho