how do i do these?

Question

solve for x

5(x+7) / 3= -18

2.5(x-4.2) / 5 -4.3 = 54

Answer 1

5(x+7) / 3 = -18
5(x+7) = -54
5x+35 = -54
5x = -89
x= -17.8

2.5(x-4.2) / 5 - 4.3 =54
2.5(x-4.2) / 5 = 58.3
2.5(x-4.2) = 291.5
2.5x - 10.5 = 291.5
2.5x = 302
x = 120.8

Answer 2

5(x+7) / 3 = - 18

first u have to use the distributive property A(B+C) = AB+AC .............. (5x+35) / 3 = -18

then its just plain algebra from there on. no complications just get x on one side and plain numbers on the other side. ............... 5x+35 = -18 * 3
5x+35 = -54
5x = -54 - 35
5x = -89

now to get the value of x u just divide the plain number by the number of x's ............ x = -17.8

ok......i think thats basically it...im pretty good in algebra...if my numbers are wrong im sry but those are basically the steps

Answer 3

distribute the 5.... to get (5x+7)/3=-18
multiply by 3.... to get (5x+7)=-54
subtract 7.... to get 5x=-61
divide by 5 to get x= -12.2


on the second one is the 5-4.3 all under the bar or just the 5?

Answer 4

algebra? with one "x" or unknown:
1) get rid of the division sign by multiplying both sides by 3, multiply through and get rid of the parentheses, so you should have 5x+35=-54, subtract 35 from both sides, 5x=-89, then divide both sides by 5


2) just do one step at a time based on the laws of addition, subttraction, multiplication, and division,

Answer 5

5(x+7) / 3= -18
1) multiply both sides by some factor to eliminate division
2) expand the left hand side
3) combine common terms


2.5(x-4.2) / 5 -4.3 = 54
1) subtract some factor from both sides to eliminate hte subtraction
2 ) multiply both sides by some factor to eliminate division
3) expand the left hand side
4) combine common terms

Answer 6

5(x+7)/3=-18, 5(x+7)=-54, 5x+35=-54, 5x=-89, x=-89/5, x=-17.8
2.5(x-4.2)/5-4.3=54, 2.5(x-4.2)/5=58.3, .5(x-4.2)=58.3,
x-4.2=116.6, x=120.8