giúp mình nha ai giúp mình like cho
Bài 1
a,x−15=−7−30=>x−15=−37=>x=−37+15=>x=−22b,21−(19+x)=−12=>19+x=21−(−12)=>19+x=33=>x=33−19=>x=14c,−6x+33=−3=>−6x=−3−33=>−6x=−36=>x=(−36):(−6)=>x=6a,x−15=−7−30=>x−15=−37=>x=−37+15=>x=−22b,21−(19+x)=−12=>19+x=21−(−12)=>19+x=33=>x=33−19=>x=14c,−6x+33=−3=>−6x=−3−33=>−6x=−36=>x=(−36):(−6)=>x=6
Bài 2
−1<x≤4−1<x≤4
=>x={0;1;2;3;4}=>x={0;1;2;3;4}
Tổng của chúng là : S=0+1+2+3+4=10
\(a,6^{12}:6^{10}-2^2.2-2022^0\\ =6^{12-10}-2^{2+1}-1\\ =6^2-2^3-1\\ =36-8-1\\ =27\\ b,-37.86+37.76\\ =37.\left(-1\right).86+37.76\\ =37.\left(-86+76\right)\\ =37.\left(-10\right)\\ =-370\\ c,-485-\left(357-485\right)+300\\ =-485-357+485+300\\ =\left(-485+485\right)+\left(-357+300\right)\\ =-57\)
a) 612 :610-22.2-20220 b)-37.86+37.76 c)-458-(357-458)+300
=62-23-1 =-0.1 =-458-(-101)+300
=27 =-57
ok ban nhen
