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Решите линейные уравнения
1) x:2+5=10.
2)−3,1⋅x+5,4=−2,35
3)7(3y+11)=−9(4y−5)+2y−7
4)2(5s+11)−3(4s+5)+7(2s−6)=10s−20
5)2,5(1 1/3z+0,2)= −0,4z+ 1 1/4
6)1/4(1,2y+2,2)−3(1,5y− 1/3)+2(y−1,9)−y+1=0
Решите линейные уравнения
1) x:2+5=10.
2)−3,1⋅x+5,4=−2,35
3)7(3y+11)=−9(4y−5)+2y−7
4)2(5s+11)−3(4s+5)+7(2s−6)=10s−20
5)2,5(1 1/3z+0,2)= −0,4z+ 1 1/4
6)1/4(1,2y+2,2)−3(1,5y− 1/3)+2(y−1,9)−y+1=0
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1) x:2+5=10
x:2=10-5
x:2=5
x=5*2
x=10
2)−3,1⋅x+5,4=−2,35
-3,1x=-2,35-5,4
-3,1x=-7,75
x=7,75:3,1
x=2,5
3)7(3y+11)=−9(4y−5)+2y−7
21y+77=-36у+45+2у-7
21у+34у=38-77
55у=-39
у=-39/55
4)2(5s+11)−3(4s+5)+7(2s−6)=10s−20
10s+22-12s-15+14s-42=10s-20
2s=-20+35
2s=15
s=7,5
5)2,5(1 1/3*z+0,2)= −0,4z+ 1 1/4
2,5(4z/3+0.2)=-0.4z+1.25
10/3z+0.5=-0.4z+1.25
10/3z+0.4z=1.25-0.5
56/15z=0.75
z=3/4*15/56
z=45/224
6)1/4(1,2y+2,2)−3(1,5y− 1/3)+2(y−1,9)−y+1=0
0,25*(1,2y+2,2)-4,5y+1+2y-3,8-y+1=0
0,3y+0,55-3,5y-1,8=0
-3,2y=1,25
y=-25/64