a) 3,2.x+1,2.x+2.7=-4,9
x.(3,2+1,2)= -4,9-2,7
x.4,4=-7,6
x=\(\frac{-7,6}{4,4}\)
x=\(\frac{-19}{11}\)
Vậy x=\(\frac{-19}{11}\)
b) -5,6.x+2,9.x-3,86=-9,8
x.(-5.6+2,9)=-9,8+3,86
x.(-2,7)=-5,94
x=\(\frac{-5,94}{-2,7}\)
x=\(\frac{11}{5}\)
Vậy x=\(\frac{11}{5}\)
a) 3,2.x+(−1,2).x+2,7=−4,9;3,2.x+(−1,2).x+2,7=−4,9;
(3,2−1,2)x=−4,9−2,7(3,2−1,2)x=−4,9−2,7
2.x=−7,62.x=−7,6
x=−3,8x=−3,8
b) (−5,6).x+2,9.x−3,86=−9,8.(−5,6).x+2,9.x−3,86=−9,8.
(−5,6+2,9).x=−9.8+3,86(−5,6+2,9).x=−9.8+3,86
−2,7.x=−5,94−2,7.x=−5,94
x=2,2
