a = 999
a×(2+3)+2017=7012
a×5+2017=7012
a×5=7012-2017
a×5=4995
a=4995:5
a=999
kb với mình
a x 2 + a x 3 + 2017 = 7012
<=> a x 2 + a x 3 = 4995
<=> a x ( 2 + 3 ) = 4995
<=> a x 5 = 4995
<=> a = 999
Vậy : a = 999
a x 2+ a x 3 + 2017 = 7012
a x ( 2 + 3 ) + 2017 = 7012
a x 5 = 7012 - 2017
a x 5 = 4995
a = 4995 : 5
a = 999
Tính nhanh
2017 x 7 - 2017 x 4 - 2017 x 3 + 2017
Tìm x biết
x + 2004 = 2017
x + 1980 = 2017
x + 1971 = 2017
giải hệ pt :
\(\hept{\begin{cases}3x^2+6xy+9y^2+\left(x+2y\right)^2\sqrt{x+2y}-3\left(x+2y\right)\sqrt{x+2y}-4\left(x+2y\right)+4\sqrt{x+2y}=0\\\left(\frac{\sqrt[3]{x^2-y^2}}{\sqrt[4]{x}}+\sqrt[4]{\frac{x}{y}}\right)^{2017}+\left(\sqrt[3]{\frac{x}{y}}-\sqrt[4]{\frac{y}{x}}\right)^{2018}=1\end{cases}}\)
Tính bằng cách thuận tiện : a. 6 x 10 x 100 x 0 + 2017 b. 402 - 46 + 298 - 600 - 54
Tìm x
x x 7 = 2017
Tìm X
X x 7 = 2017
a .(18 – 9 x 2) x (2 + 4 + 6 + 8 + 10)
b.(7 x 8 – 56 ) : (2 + 4 + 6 + 8 + 112)
c. (2 + 125 + 6 + 145 + 112) x (42 – 6 x 7)
d.(12 x 6 – 12 x 4 – 12 x 2) x ( 347 + 125)
e(a x 7 + a x 8 – a x 15) : (1 + 2 + 3 + ........ + 10)
f.58 – 58 x (6 + 54 – 60)
g.32 + 63 x a x ( a x 1 – a : 1) + 32 x 8 + 32
h.(1 + 2 + 3 + 4 + .... + 9) x (21 x 5 – 21 – 4 x21)
i.(9 x 7 + 8 x 9 – 15 x 9) : (1 + 3 + 5 + 7 + ........+ 17 + 19)
k.(2 + 4 + 6 + 8 + ... + 20) x (56 x 3 – 72 : 9 x 21)
A = (a x 7 + a x 8 - a x 15) : (1 + 2 + 3 + ........ + 10)
B = (18 - 9 x 2) x (2 + 4 + 6 + 8 + 10)
Toán nâng cao : 720 : ( a x 3 + a x 5 ) = 2 x 3
