3a) Answer: 84 degrees
Step-by-step explanation:
3x + 2(x+20)= 180 (total sum of angles in a triangle is 180 degrees)
5x+40 = 180
5x = 140
x= 28
3x= 28 x 3
= 84
Answer:
let the number be x
4x-6=3x+8
Step-by-step explanation:
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Answer:
Step 4 : he should have divided both sides by negative seven
Step-by-step explanation: