a, \(\frac{11}{4}\) + \(\frac{3}{2}\): l 4x - \(\frac{1}{5}\)I = \(\frac{7}{2}\)
\(\frac{3}{2}\): l 4x - \(\frac{1}{5}\)I = \(\frac{3}{4}\)
l 4x - \(\frac{1}{5}\)I = 2
=> Xét 2 th : \(\orbr{\begin{cases}4x-\frac{1}{5}=2\\4x-\frac{1}{5}=-2\end{cases}}\) =>\(\orbr{\begin{cases}x=\frac{11}{20}\\x=\frac{-9}{20}\end{cases}}\)
Bài b tương tự bạn tự làm đi nhé .Tích cho mk <3
{(-5/7)-7/9+9/11-11/13}x(3-3/4)
(10/21+14/27-6/11+22/39):(2-2/3)
-3/4x 4/11 + -5/4 x 4/11 7/12 - -1/5 - 5/6 + 2/3 + -1/5
1. Thực hiện phép tính
G=(-5/7-7/9+9/11-11/13).(3-3/4)
phần (10/21+14/27-6/11+22/39):(2-2/3)
( -5/7 - 7/5 + 9/11 - 11/13 ) * ( 3-3/4) : ( 10/21 + 14/27 - 6/33 + 22/39) : ( 2-2/3)
3x-21/3 + 4x-32/2 = 5x-37/4 + 9x-33/6
x+5/4 + x+6/3 + x+7/2 + x+8/1 = -4
Thực hiện phép tính: a,(9/10 - 15/16) X (5/12 - 11/15 - 7/20) b,(-1)3 + (-2/3)2: 2 2/3 + 5/6 c,15 X (-1/5)2 + 1/5 - 2 X (-1/2)3 - 1/2 d,22 - (-5/7) + (1/3)4 X 36
a,5^x+4-3×5^x+3=2×5^11
b,3×5^x+2+4×5^x-3=19×5^10
c,6×8^x-1+8^x-1=6×8^19+8^21
d,5×2^x+3×2^x+2=5×2^5+3×2^7
Tìm x biết :
a, 4.(18 - 5x) - 12.(3x - 7) = 15.(2x - 16) - 6(x + 14)
b, 5.(3x + 5) - 4.(2x - 3) = 5x + 3.(2x + 12) + 1
c, 2.(5x - 8) - 3.(4x - 5) = 4.(3x - 4) + 11
d, (3x + 2)(2x + 9) - (x + 2)(6x + 1) = (x + 1) - (x - 6)
e, (8x - 3)(3x + 2) - (4x + 7)(x + 4)= (2x + 1)(5x - 1) - 33
a) -7/2+3/4-17/12
b)3/4+(-9/5)-4/3
c)-1/12-( 21/3-1/3)
d) 22/7.(-7/11)+18
e)(3/4+2/3):17/4-3/4