-2(1/3х+7)=-21 1/3х-дробь Помогите ✨

-2(1/3х+7)=-21 1/3х+7=-21:(-2) 1/3х+7=10 1/2 1/3х=10 1/2-7 1/3х=3 1/2 1/3х=7/2 х=7/2:1/3 х=21/2 х=10 1/2

[latex]-2( \frac{1}{3x} +7)=-21[/latex] [latex]-2*\frac{1+21x}{3x}=-21[/latex] [latex]-\frac{2(1+21x)}{3x}=-21[/latex] [latex]-\frac{2(1+21x)}{3x}=-21, x \neq 0[/latex] [latex]-\frac{2+42x}{3x}=-21[/latex] [latex]-(2+42x)=-63x[/latex] [latex]-2-42x=-63x[/latex] [latex]-42x+63x=2[/latex] [latex]21x=2[/latex] [latex]x= \frac{2}{21} [/latex]