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dễ mà 460 + 85 * 4 = x + 175 : 5 + 30
460 + 340 = x + 35 + 30
800 = x + 65
800 - 65 = x
735 = x hay x = 735
460+85x4=x+175:5+30
460 + 340 = x + 35 + 30
800 = x + 65
x = 800 - 65
x = 735
460 + 85 *4 = x + 175 / 5 + 30
460 + 340 = x + 35 + 30
800 = x + 65
x = 800 - 65
x = 735
460 + 85 *4 = x + 175 :5 + 30
460 + 340 = x + 35 + 30
800 = x + 65
x = 800 - 65 = 735
\(1) 420+65.4=(x+175):5+30\)
\(\implies 420+260=(x+175):5+30\)
\(\implies 680=(x+175):5+30\)
\(\implies 650=(x+175):5\)
\(\implies 650.5-175=x\)
\(\implies 3075=x\)
\(2)x-4867=(175.2050.70):25+23\)
\(\implies x-4867=1004500+23\)
\(\implies x-4867=1004523\)
\(\implies x=1009390\)
\(3) 134-[(96-7x):4-2]=126\)
\(\implies (96-7x):4-2=8\)
\(\implies(96-7x):4=10\)
\(\implies 96-7x=40\)
\(\implies 7x=56\)
\(\implies x=8\)
\(4) 4-\{100-[(100-5x):8-5]:10\}:25=0\)
\(\implies 4-\{100-[(100-5x):8-5]:10\}=0\)
\(\implies 100-[(100-5x):8-5]:10=4\)
\(\implies 100-[(100-5x):8-5]=40\)
\(\implies (100-5x):8-5=60\)
\(\implies (100-5x):8=65\)
\(\implies 100-5x=520\)
\(\implies 5x=-420\)
\(\implies x=-84\)
~ Hok tốt a~
460+85x4=(x+175):5+30
<=>460+340=x.1/5+175.1/5+30
<=>800=1/5x+35+30
<=>735=1/5.x
<=>x=3675
Chúc bạn học tốt ^_^
460 + 85 x 4 = ( x+ 175 ) : 5 + 30
= 460 + 340 = ( x + 175 ) : 5 + 30
= 800 = ( x + 175 ) : 5 + 30
= ( x + 175 ) : 5 = 800 - 30
= ( x+ 175 ) : 5 = 770
= ( x +175 ) = 770 x 5
= x + 175 = 3850
x = 3850 - 175
x = 3675