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Answer:
26
Step-by-step explanation:
➝6x-4+83=21x+4
➝6x+79=21x+4
➝21x+4=6x+79
➝21x-6x=79-4
➝15x=75
➝x=75/15
➝x=5
M<D
➝6x-4
➝6(5)-4
➝30-4
➝26°
