Question

a) 7.(×-2)=5.(×+3)=
b) 2.(×-5)+4(×-1)=0
c)3.(2×-1)=2(×+3)
d)7.(×-1)-2(×-5)=×-5

me ajudem por favor

Answer 1

a) 7(x-2)=5(x+3)
>> 7x-14=5x+15
>> 7x-5x=15+14
>> 2x=29
>> x=29/2

b) 2(x-5)+4(x-1)=0
>> 2x-10+4x-4=0
>> 6x-14=0
>> 6x=14
>> x=14/6(÷2)
>> x=7/3

c) 3(2x-1)=2(x+3)
>> 6x-3=2x+6
>> 6x-2x=6+3
>> 4x=9
>> x=9/4

d) 7(x-1)-2(x-5)=x-5
>> 7x-7-2x-10=x-5
>> 5x-12=x-5
>>5x-x=-5+12
>> 4x=7
>> x=7/4