Question 1055964
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If <1 and <2 are supplementary angles and m<1= (3x+12) and m<2= (7x-30) find the value of x?
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<pre>
Then 

(3x+12) + (7x-30) = 180,

10x - 18 = 180,

10x = 180 + 18 = 198,

x = {{{198/10}}} degrees.
</pre>

For more problems of this kind see the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Points-lines-and-rays/Solved-problems-on-supplementary-and-complementary-angles-and-pairs-of-angles.lesson>Solved problems on supplementary and complementary angles</A>

in this site.