resolva as equações k) 4x+7x-7x=16 L)-x+2(x+1)=0 m) 2/3 x =8 n) 4/5 x -1=1
Soluções para a tarefa
Resposta:
ok
Explicação passo-a-passo:
K) Simplify 4x+7x-7x4x+7x−7x to 4x4x.
4x=164x=16
2 Divide both sides by 44.
x=\frac{16}{4}x=
4
16
3 Simplify \frac{16}{4}
4
16
to 44.
x=4x=4
L)1 Expand.
x+2x+2=0x+2x+2=0
2 Simplify x+2x+2x+2x+2 to 3x+23x+2.
3x+2=03x+2=0
3 Subtract 22 from both sides.
3x=-23x=−2
4 Divide both sides by 33.
x=-\frac{2}{3}x=−
3
2
M)1 Simplify \frac{2}{3}x
3
2
x to \frac{2x}{3}
3
2x
.
\frac{2x}{3}=8
3
2x
=8
2 Multiply both sides by 33.
2x=8\times 32x=8×3
3 Simplify 8\times 38×3 to 2424.
2x=242x=24
4 Divide both sides by 22.
x=\frac{24}{2}x=
2
24
5 Simplify \frac{24}{2}
2
24
to 1212.
x=12x=12
N)1 Simplify \frac{4}{5}x
5
4
x to \frac{4x}{5}
5
4x
.
\frac{4x}{5}-1=1
5
4x
−1=1
2 Add 11 to both sides.
\frac{4x}{5}=1+1
5
4x
=1+1
3 Simplify 1+11+1 to 22.
\frac{4x}{5}=2
5
4x
=2
4 Multiply both sides by 55.
4x=2\times 54x=2×5
5 Simplify 2\times 52×5 to 1010.
4x=104x=10
6 Divide both sides by 44.
x=\frac{10}{4}x=
4
10
7 Simplify \frac{10}{4}
4
10
to \frac{5}{2}
2
5
.
x=\frac{5}{2}x=
2
5
tomara que ajude.