\(1.\\ A=23\times\left(-24\right)+24\times\left(-77\right).\\ =-24\left(23+77\right).\\ =-24.100=-2400.\\ B=-31\times48-38\times24.\\ =-31\times48-19\times48.\\ =48\left(-31-19\right).\\ 48.\left(-50\right)=-2400.\\ C=1\times3\times5^3\times\left(-2\right)\times\left(-8\right).\\ =3\times125\times16.\\ =48\times125=6000.\)
\(2.\\ a,2x-5=-17.\\ \Leftrightarrow x=\dfrac{-17+5}{2}=-6.\\ b,5-8x=-27.\\ \Leftrightarrow-8x=32.\\ \Leftrightarrow x=-4.\\ c,2\left(x-1\right)+3\left(x+4\right)=50.\\ \Leftrightarrow2x-2+3x+12-50=0.\\ \Leftrightarrow5x=40.\\ \Leftrightarrow x=8.\\ d,18-4:x=14.\\ \Leftrightarrow4:x=4.\\ \Leftrightarrow x=1.\)
bai1
\(\text{a}=-552+\left(-1848\right)=-2400\\ b=-1488-912=-576\\ c=3.125.\left(-2\right).\left(-8\right)=375.\left(-2\right).\left(-8\right)=-750.\left(-8\right)=6000\)
\(A=24\left(-23-77\right)=24.\left(-100\right)=-2400\)
\(B=24\left[2.\left(-31\right)-38\right]=24\left(-100\right)=-2400\)
C(đọc ko nổi đề)
\(a;\Leftrightarrow x=\dfrac{-17+5}{2}=-6\)
\(b;\Leftrightarrow x=\dfrac{-27-5}{-8}=4\)
\(c;\Leftrightarrow5x+10=50\Leftrightarrow x=\dfrac{50-10}{5}=8\)
d;\(x\ne0\Rightarrow pt\Leftrightarrow\dfrac{-4}{x}=-4\Leftrightarrow x=1\left(tm\right)\)
\(b\text{a}i2\\ \text{a},2x=-17+5\\ 2x=-12\\ x=\left(-12\right):2\\ x=-6\\ b,8x=5-\left(-27\right)\\ 8x=32\\ x=32:8\\ x=4\\ c,2x-2+3x+12=50\\ 5x+10=50\\ 5x=50-10\\ 5x=40\\ x=40:5\\ x=8\\ d,4:x=18-14\\ 4:x=4\\ x=4:4\\ x=1\)
