Hey there!
<h3>"Expanded form" is basically, setting it up in a addition form to give you that result</h3>

Good luck on your assignment and enjoy your day!
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Step-by-step explanation:
It is an isosceles triangle , it has two equal angles both 55°.
All Isosceles triangles have two equal angles <em>a</em><em>n</em><em>d</em> two equal sides.
So in this case x +18 is equal to 3x, and to find x you will equal them to each other to create a linear equation and solve.
x + 18 = 3x
x - 3x = -18
-2x = -18
× = -18 / -2
× = 9 <em>(</em><em>a</em><em>n</em><em>s</em><em>)</em><em> </em>
Hope I was able to help. Good Luck :)))
Answer:
-9
Step-by-step explanation:
Parentheses first:16-35+4 = -35+16+4 = -35+20 = -15
3(-15) = -45/5
-45 divided by 5 = -9
8x+2.50=3.50
-2.50 -2.50 subtract both sides by -2.50
8x=1
8. 8 divide both sides by 8
x=1/8