5x+2.7y=175x
=>5x.25.7y=175x
=>25.7y=35x
=>52.7y=35x
=>352.7y-2=35x
=>7y-2=35x-2
=>x-2=y-2=0
=>x=y=2
vậy x=y=2
5x+2.7y=175x
=>5x.25.7y=175x
=>25.7y=35x
=>52.7y=35x
=>352.7y-2=35x
=>7y-2=35x-2
=>x-2=y-2=0
=>x=y=2
vậy x=y=2
giúp mk nhé tính
\(\left(125^3\times7^5-175^5\div5\right)\div2001^{2002}\)
Tìm số nguyên âm x, biết:
\(^{x^2}-\left(\frac{3}{5}\right)^2=\frac{1}{1\times2}+\frac{1}{2\times7}+\frac{1}{5\times7}+\frac{1}{5\times13}+\frac{1}{8\times13}+\frac{1}{8\times19}+\frac{1}{11\times19}+\frac{1}{11\times19}+\frac{1}{11\times25}\)
AI NHANH MK TICK CHO NHA!
Bài 1: Tính
a. (125^3 . 7^5 - 175^5 : 5) : 2001^2002
b. 16. 64.8^2 : (4^3. 2^5 .16)
Bài 2: Chứng minh
a . ( x-y ) . ( x+y) = x^2 - y^2
b. ( x+y )^2 + 2xy + y^2
Tìm x;y thuộc N:
a) 5x+2 . 7y = 175x
b) 9x-1 . 5y = 75x
\(\frac{2}{1\times3}+\frac{2}{3\times5}+\frac{2}{5\times7}+.....+\frac{2}{x\times\left(x+2\right)}=\frac{2015}{2016}\)
Tìm x biết:
a) 175 - y : 35 - 30 = 110
b) 7/4 - y x 2/5 + 3/5 = 3/2
Tìm x
a, 240 : +65 .4 = ( x + 175 ) : 5 + 30
b,( 32 . 5 ) :2 = (x + 70 ) : 14 - 2
c, x- 4867 = ( 175 . 2050 . 70 )
\(\frac{2}{3\times5}+\frac{2}{5\times7}+\frac{2}{7\times9}+...+\frac{2}{x\times\left(x+2\right)}=\frac{32}{99}\)\(\frac{32}{99}\)
tìm x
Tìm X,Y Thuộc N biết : 5x+1 * 7y = 175x