Question

Să se rezolve ecuațiile: a)2×{2+2×[2+2×(6-2x)]}=28
b)3×(2x+1)=9+2×(2x-1)
c)3×(2x+5)+2×(4x-5)=2×(5x+9)+3

Answer 1

Explicație pas cu pas:

a) 2+2•[2+2•(6-2×)]=14

2•[2+2•(6-2×)]=12

2+2•(6-2×)=6

2•(6-2×)=4

6-2×=2

2×=4

×=2

b) 6×+3=9+4×-2

6×+3=7+4×

2×=4

×=2

c)6×+15+8×-10=10×+18+3

14×+5=10×+21

4×=16

×=4