Asked by Kate

Given: ∠ABC and ∠CBD are supplementary angles. m∠ABC = 4x + 7, m∠CBD = 2x − 1. Prove: m∠ABC = 123

How do I write this in a two column proof?
Answered by bobpursley
4x+7 + 2x-1=180
6x=172
x=28.5
4x+7=123
Answered by Amya
What does angle CBD measure
Answered by Amya
What does angle CBD measure
Answered by Roberto(not real name)
4x+7 + 2x-1=180
6x=172
Round up from 28.6
x=29

4(29)+7=123
2(29)-1=57

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