Question

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Answer 1

б)

$\frac{3x - 10}{2} = - 1 \\ 3x - 10 = - 2 \\ 3x = - 2 + 10 \\ 3 x= 8 \\ x = \frac{8}{ 3 } \\ x = 2 \ \frac{2}{3}$

в)

$\frac{7 - x}{6} = \frac{19x - 11}{8} \\ 8(7 - x) = 6(19x - 11) \\ 56 \ - 8x = 114x - 66 \\ - 8x - 114x = - 66 - 56 \\ - 122x = - 122 \\ x = 1$

в)

$\frac{x + 3}{10} = \frac{1}{5} \\ 5(x + 3) = 10 \\ x + 3 = 2 \\ x = 2 - 3 \\ x = - 1$

Answer 2

б) (3х-10)÷2= -1

3х= -1+10×2

3х= 18

х= 18÷3

х= 6

в) (х+3)÷10=1/5

х=1/5-3×10

х=-30,1/5

в) (7-х)÷6=(19х-11)÷8

-х-19х=(-11-7)÷8×6

-20х=-18÷48

х=0,375÷20

х=0,01875