Question

Daje naj PROSZĘ TO NA JUTRO
chodzi żeby obliczyć ile to jest ta niewiadoma np; a,b,c,m itp
rozwiąż równania
1. 15 + a = 20
2. 3/10 * b = 12
3. x : 1/2 = 16
4. y - 6 i 4/5 = 12 i 3/10
5. 15 i 1/2 - m = 10 i 3/10
6. 8 : a = 2/5
7. b + 7 i 2/5 = 13 i 1/2
8. c * 1 i 1/10 = 55
9.d - 5 i2/5 = 10
10. 16 : a = 4/5
11. 8 i 3/10 + p = 12
12. 7 i 4/5 * k = 39

Answer 1

1. 15 + a = 20
a=20-15
a=5
2. 3/10 * b = 12  *10/3
b=12*10/3
b=120/3
b=40
 
3. x : 1/2 = 16 /*2/1
x=32

4. y - 6 i 4/5 = 12 i 3/10
y=12,3+6,8
y=19,1=19 i 1/10
5. 15 i 1/2 - m = 10 i 3/10
15 1/2-10 3/10=m
m=15 5/10- 10 3/10
m=5 2/10
6. 8 : a = 2/5 /*a
8=2a/5 /*5
40=2a /:2
a=20


7. b + 7 i 2/5 = 13 i 1/2
b=12 5/10- 7 4/10
b=5 1/10
8. c * 1 i 1/10 = 55
c*11/10=55 /*10/11
c=550/11
c=50
9.d - 5 i2/5 = 10
d=10+5 2/5
d=15 2/5
10. 16 : a = 4/5 /*a
16=4a/5 /*5
80=4a /:4
a=20
11. 8 i 3/10 + p = 12
p=12-8 3/10
p=3 7/10
12. 7 i 4/5 * k = 39 /:7 4/5
k=39:39/5
k=39 * 5/39
k=5