Question

Resolva os sistemas de equações:
a) 3(x+2)+4x=3(x-1)
b) 4(7+x)-3X+20=7X-14
c) 21(x-1)+30-14x=17-5x
d) 3(5+x)=(2x+4)² -10

urgente galera! :(

Answer 1

a)3x+6+4x=3x-3
3x+4x-3x=-3-6
4x=-9
x=-9/4

b)28+4x-3x+20=7x-14
4x-3x-7x=-14-20-28
-6x=-62
6x=62
x=62/6

c)21x-21+30-14x=17-5x
21x-14x+5x=17-20+21
12x=18
x=18/12

d)8+3x=4x²+16-10
3x-4x²=16-10-8
3x-4x²=-2