b) Ta có: (-x)+14=12
\(\Leftrightarrow-x+14=12\)
\(\Leftrightarrow-x=12-14=-2\)
hay x=2
Vậy: x=2
-x = 12 - 14
-x = -2
\(\Rightarrow\)x = 2
b) Ta có: (-x)+14=12
\(\Leftrightarrow-x+14=12\)
\(\Leftrightarrow-x=12-14=-2\)
hay x=2
Vậy: x=2
-x = 12 - 14
-x = -2
\(\Rightarrow\)x = 2
Tìm x, biết: [(8x -12) :4].3 =
Tìm x biết: a)-12.(x-5)+7.(3-x)=15 b)30.(x=2)-6.(x-5)-24x=100 c)(x-3).(2x+1)=0d)(x-7).(x+3)=0
tìm x ,biết :
a. (-30)-(-x)=13
Tìm x, biết:
(x-2) . (y+1) = -2
So sánh a, (-12) x 1125 x (-9) x(-5).3 với 0
b, 21.(-25).(-6).(-3).18.(-2022) với 0Tìm x
a,(x-2).(y+3)=15
b,(3x+2).(1-y)=-7
c,xy-5x=14-(-1)
c',xy+x=5
d,5xy-5x+y=5
Bài 1. Tìm số nguyên x, y:
a) x.y = - 21
b) x . (y-3) = -12
1/ -7(5-x)-2(x-10)=15
2/ 4(x-5)-3(x+7)= -19
3/ 4(2-x)+3(x-5)=14
4/ 7(x-9)-5(6-x)=-6+11x
5/ -7(3x-5)+2(7x-14)=28
6/ 5(4-x)-7(-x+2)=4-9+3
7/ 4x-5(-3+x)=7
8/ 5(x-7)+10(3-x)=20
9/ 7(5-x)+5(x-2)=15
(x3+64).(\(\left|x\right|\)+14)=0