Answer: [tex]x=-6[/tex]
Simplify both sides of the equation
[tex]511=(-7)(10x)+(-7)(-13)(Distribute)\\511=-70x+91[/tex]
Flip the equation
[tex]-70x+91=511[/tex]
Subtract 91 from both sides
[tex]-70x+91-91=511-91\\-70x=420[/tex]
Divide both sides by -70
[tex]-70x/70=420/-70\\x=-6[/tex]
Answer:
[tex]511 = - 7(10x - 13) \\ 511 = - 70x + 91 \\ 511 - 91 = - 70x \\ 420 = - 70x \\ \frac{420}{ - 70} = \frac{ - 70x}{ - 70} \\ \\ x = - 6[/tex]
hope this helps you...
