Question

qual o valor de X nas seguintes equações.
A)2x-3=7(x-4
B)x+11=6(x-19)
C)7(x+10)-8(x+8)=0
D)6(x-3)-9(x-5)=x-1

Answer 1

Resposta:

$a) 2x-3=7(x-4)\\2x=7x-28+3\\2x-7x=-25\\5x=25\\x=5\\\\b)x+11=6(x-19)\\x=6x-114-11\\x-6x=-125\\5x=125\\x=25\\\\c)7(x+10)-8(x+8)=0\\7x+70-8x-64=0\\7x-8x=64-70\\-x=-6\\x=6\\\\d)6(x-3)-9(x-5)=x-1\\6x-18-9x-45=x-1\\6x-9x-x=-1+18+45\\-4x=62\\4x=-62\\x=\frac{62}{4}\\x=\frac{31}{2}$