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How can I solve and start ?

How can I solve and start ?-example-1
User Arturhoo
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Ok so u have to set them equal to 180 bc they r supp lines so 1.15+x=180 sub 15 from both sides x=165
2.28+x-4=180 combine like terms 28-4=24 rewrite 24+x=180 den sub 24 from both sides x=156
I will put the rest in the comments if you still don't know
User Jaspreet Jolly
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