I don't know how to solve. I keep trying tho

Mathematics

1 answer:

ololo11 [35]3 years ago

4 0

Alright, so for this, you have to;
1st- 3(7-x), you would multiply the outside # with everything on the inside and get 21 - 3x
2nd- You compare like terms, in this case, 6x and 2x, in turn you get 8x
3rd- You rewrite the problem to be -- 8x + 7 + 21 -3x
4th - You compare like terms again, this time, with the 7 and 21, you would add them since they both are positive and you would then get 28
~As for the rest, you would do 8x-3x and get 5x
Your final answer in proper formatting would be 5x+28

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Please answer this question only if you know it! 25 points and brainliest!

krok68 [10]

Answer:

$\boxed{70^\circ}$

Step-by-step explanation:

Step 1. Calculate θ

$\begin{array}{rcll}70^{\circ} + \theta + 60^{\circ} & = & 180^{\circ} & \text{Angles of straight line}\\130^{^{\circ}} + \theta & = & 180^{\circ}} & \\\theta & = & 50^{\circ} & \\\end{array}$

Step 2. Calculate x

$\begin{array}{rcll}60^{\circ} + \theta + x & = & 180^{\circ} & \text{Interior angles of triangle}\\60^{\circ} + 50^{\circ} + x & = & 180^{\circ} &\\110^{^{\circ}} + x& = & 180^{\circ} & \\\\x & = & \boxed{70^\circ} & \\\end{array}$