Question

In the following figures, find x.
3x+10 2x-40​

Answer 1

Answer:

3x+10=2x-40

3x -2x = -40 -10

x= -50

Answer 2

Answer:

x = 42°

Step-by-step explanation:

The figure (which is not given) is a linear pair.

Since, linear pairs measure 180°,

We can form an equation-

$3x + 10 \degree + 2x - 40 \degree = 180 \degree$

$3x + 2x + 10 \degree - 40 \degree = 180 \degree$

$5x - 30 \degree = 180 \degree$

$5x = 180 \degree + 30 \degree$

$5x = 210 \degree$

$x = 42 \degree$

Therefore, x = 42°

Verification,

Putting 42° in place of x

$3(42 \degree) +10 + 2(42 \degree) - 40 \degree= 180 \degree$

$3 \times 42 \degree + 10 \degree + 2 \times 42 \degree - 40 \degree = 180 \degree$

$126 \degree + 10 \degree + 84 \degree - 40 \degree = 180 \degree$

$136 \degree + 84 \degree - 40 \degree = 180 \degree$

$220 \degree - 40 \degree = 180 \degree$

$180 \degree = 180 \degree$

Hence, verified that x = 42°

(I checked your previous question where you attached the figure, and which was deleted, and hence, I could answer your question correctly.

The others may haven't checked your previous post, that's why they are giving wrong answers.)