Question

c)10y-5=2y
d)x+×+2=+12
e)x-5-2x=-3x
f)4x+6=5
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Answer 1

c)10y-5=2y

10y - 2y = 5

8y = 5

$y = \frac{5}{8}$

y= 0, 625

d)x+×+2=+12

2x = 12 - 2

2x = 10

$x = \frac{10}{2}$

x = 5

e)x-5-2x=-3x

3x + x - 2x = 5

2x = 5

$x = \frac{5}{2}$

x = 2, 5

f)4x+6=5

4x = 5 - 6

4x = - 1

$x = \frac{ - 1}{4}$

x = - 0, 25