Seudónimo
Seudónimo
31-10-2017
Mathematics
contestada
Please help, or I'll float.
Respuesta :
WojtekR
WojtekR
31-10-2017
[tex]3(x+2)+4(x-5)=10\\\\3\cdot x+3\cdot2+4\cdot x+4\cdot(-5)=10\\\\3x+6+4x-20=10\\\\7x-14=10\quad|+14\\\\7x-14+14=10+14\\\\7x=24\quad|:7\\\\\\\boxed{x=\frac{24}{7}}[/tex]
Answer B.
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