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5(x+4)+2x=6-4(2x+3)+7 The answer my calculator gives is -19/15. How did they get that?

what are the differences between a vein and an artery? Give your answer with reference to specific examples. I don't know how to refer to specific examples...please help me..

If sinθ=4/5 and cosθ<0,find the exact value of cosθ and tanθ help me!

Mrs lee is 26 years older than her son. how old is Mrs lee when she is 3 times as old as her son.

after i add 8x though i'm left with 13x+20+10x=6-12+7

Does anyone know?

I don't understand, why did you not break it down, please do