Question

[Nguyễn thị anh thư]

Tìm x:

a) 3,2 . x + ( - 1,2 ) . x + 2,7 = - 4,9

b) ( - 5,6 ) . x + 2,9 . x - 3,86 = -9,8

Answer 1

[๖ۣۜƝƘ☆❖TྂRí❖TIêNྂᴾᴿᴼAK❖47シRồng lửa]

\(3,2.x+\left(-1,2\right).x+2,7=-4,9\)

\(x.\left(-1,2+3,2\right)+2,7=-4,9\)

\(x.2+2,7=-4,9\)

\(x.2=-4,9-2.7\)

\(x.2=-7,6\)

\(x=-7,6:2=-3,8\)

Answer 2

[๖ۣۜƝƘ☆❖TྂRí❖TIêNྂᴾᴿᴼAK❖47シRồng lửa]

\(\left(-5,6\right).x+2,9.x-3,86=-9,8\)

\(x.\left(-5,6+2,9\right)-3,86=-9,8\)

\(x.\left(-2,7\right)-3,86=-9,8\)

\(x.\left(-2,7\right)=-9,8+3,86\)

\(x.\left(-2,7\right)=-5,94\)

\(x=-5,94:\left(-2,7\right)\)

\(x=2,2\)