What is the solution to the equation -3a +5=a-3(2a+1)​

the answer is a = -4

Step-by-step explanation:

pls mark brainliest

a = -4

Step-by-step explanation:

To find a, we need to get the variable on one side of the equation. So first we distribute.

-3a+5=a-6a-3 Now we subtract 5 from both sides and add the a to the -6a

-3a=-5a-8 Now we add 5a to both sides

2a=-8 And lastly divide both sides by 2

a= - 4

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∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

12cm

the answer is d