Tìm số nguyên x , biết

10 - 2 ( 4 - 3x) = -4

c) -12 + 3(-x + 7 ) = -18

-45 : 5 . (-3 - 2x) = 3

3x - 28 = x +36

(-12)² . x = 56 + 10 . 13x

Tìm số nguyên x , biết

\(10\) ⋮ \(\left(x-1\right)\)

\(b.\left(x+5\right)\) ⋮ \(\left(x-2\right)\)

c. \(\left(3x+8\right)\) ⋮ \(\left(x-1\right)\)

Tính:

\(-3^2+\left\{-54:\left[-2^8+7\right]\cdot\left(-2\right)^2\right\}\)

Tính hợp lí :

\(31\cdot\left(-18\right)+31\cdot\left(-81\right)-31\)

\(\left(-12\right)\cdot47+\left(-12\right)\cdot52+\left(-12\right)\)

\(13\cdot\left(23+22\right)-3\cdot\left(17+28\right)\)

\(-48+48\cdot\left(-78\right)+48\cdot\left(-21\right)\)

rút gọn biểu thức :

(2a - 3b) - (5b - d) + (8b - d) = 2a

(a + b ) - (d - 4b ) - (c - 10d) = 2a - 2b - 6d +c

(2a - 3b) - (5b - d) + (8b - d) = 2a

(a + b ) - (d - 4b ) - (c - 10d) = 2a - 2b - 6d +c

Complete each sentence of the following sentences wih one suitable word

You look really smart in your new school....!

In the afternoon students do sports in the.....

In maths lessons , I bring my calculator , ruler and...

Do you often....your bike to school?