Question

Va rog foarte mult sa ma ajutati sunt in criza va implor este ex 6 trebuie sa aflati x din proporti

Answer 1

a)7x+7=12,6
7x=5,6
x=0,8
b)5(5x+2)=60
25x+10=60
25x=50
x=2
c)5^80(2^82 + 2^82) = (2•5)^80(x+3)
5^80•2^83 = 2^80 • 5^80(x+3)
x+3=(5^80•2^83)/(2^80•5^80)
x+3=2^3
x+3=8
x=5
d)2^2(5•2^16 + 2^14 - 2^15) = 38(x-3)
2^2 • 2^14 • (5•2^2 + 1 - 2) = 38(x - 3)
2^16 • 19 = 38(x-3)
2^16 = 2x-6
2x=6 + 2^16
2x=6+2•2^15
2x=2(3+2^15)
x=3+2^15
e)2/5 • (1/3 + 13/6) = x
2/5 • 15/6 = x
x=1
f)25/2 • 4/100 = 0,2x
1/2 = x/5
x=5/2=2,5
g)4/9•(x + 1/5) = 1/3 + 1
4x/9 + 4/45 = 4/3
20x=60-4
20x=56
x=56/20
x=2,8
h)0,012=2x/3(1 - 4/5)
3/25=2x/3 - 8x/15
9=50x-40x
9=10x
x=9/10