Question

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Answer 1

$3x + 2 = 8$

$3x = 8 -2$

$3x=6$

$0,2x +3,5 =-0,7$

$0,2x = -0,7 -3,5$

$0,2x = 4,2$

$0.2x\cdot \:10=4.2\cdot \:10$

$2x=42$

$x = 42:2$

$x = 21$

$\sqrt{5} x = 3\sqrt{15}$

$\frac{\sqrt{5}x}{\sqrt{5}}=\frac{3\sqrt{15}}{\sqrt{5}}$

$x=3\sqrt{3}$