X+15/5=0.5-0.1X-0.7/0.3

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X+15/5=0.5-0.1X-0.7/0.3X+15/5=0.5-0.1X-0.7/0.3X+15/5=0.5-0.1X-0.7/0.3X+15/5=0.5-0.1X-0.7/0.3X+3=-11/

X+15/5=0.5-0.1X-0.7/0.3
X+15/5=0.5-0.1X-0.7/0.3

X+15/5=0.5-0.1X-0.7/0.3
X+15/5=0.5-0.1X-0.7/0.3
X+3=-11/6-0.1X
x+0.1x=-11/6-3
1.1x=-29/6
x=-29/6÷11/10
x=-145/33