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Sagot :
Answer:
d = 42
Step-by-step explanation:
since you have two angles which add up to a straight line, you know that they must equal 180°
simply
180 = (d + 7) + (3d + 5)
180 = 4d + 12
d = 42
Answer:
d=42
Step-by-step explanation:
180-7=173
173-5=168
168/(3+1)=42
d=42
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