Câu 2:
a: 85-x=126
=>x=85-126
=>x=-41
b: 76-(x-87)=47
=>x-87=76-47=29
=>x=29+87=116
c: \(584-\left(x-1\right)^3=-416\)
=>\(\left(x-1\right)^3=584+416=1000\)
=>x-1=10
=>x=11
Câu 1:
a: \(-152+163+152-63\)
\(=-152+152+163-63\)
=0+100
=100
b: \(51\cdot85+51\cdot34-51\cdot19\)
\(=51\left(85+34-19\right)\)
\(=51\cdot100=5100\)
c: \(\left(-2\right)^2\cdot\left(2022^0+24\right)-123\)
\(=4\left(1+24\right)-100-23\)
=100-100-23
=0-23
=-23