QUESTION IMAGE
Question
asures of the angles of a triangle are shown in the figure below. solve for x. (5x + 17)° 48° answer attempt 1 out of 2
Step1: 明确三角形内角和定理
三角形内角和为180°。
Step2: 列方程
因为三角形一个角是90°,一个角是48°,另一个角是(5x + 17)°,所以可列方程90 + 48+(5x + 17)=180。
Step3: 化简方程
先计算90 + 48 + 17 = 155,方程变为155+5x = 180。
Step4: 求解x
移项可得5x=180 - 155,即5x = 25,两边同时除以5,得x = 5。
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x = 5