tìm x biết :a) 35-(-452+49) -(x+(-54))=54- (452-35)
b) 37-(4-7.x)+(395-87)=8.x-(87-37-395) (trình bày theo quy tắc dấu ngoặc nhé) help meeeeeeeeeeee
tìm x biết :a) 35-(-452+49) -(x+(-54))=54- (452-35) b) 37-(4-7.x)+(395-87)=8.x-(87-37-
By Emery
a,35-(-452+49) -(x+(-54))=54- (452-35)
x+(-54)=35-(-452+49)-54-(452-35)
x-54=35+452-49-54-452+35
x =35+452-49-54-452+35+54
x =(35+35)+(452-452)+(-54+54)-49
x =70+0+0+49=119
b) 37-(4-7.x)+(395-87)=8.x-(87-37-395)
37-4+7x+395-87=8x-87+37+395
8x-7x=(87+37+395)-(37-4+395-87)
x= 87+37+395-37+4-395+87
x=(87+87)+(37-37)+(395-395)+4
x=174+0+0+4=178