3x -5 =7 the solution for X is?

Mathematics

2 answers:

BabaBlast [244]2 years ago

7 0

Answer:

x = 4

Step-by-step explanation:

[ changing sides, changes addition to subtraction and subtraction to addition] [ multiplication changes to division and division changes to multiplication]

3x -5 =7

3x = 7 + 5

3x = 12

x = 12/3

x = 4

s2008m [1.1K]2 years ago

5 0

Answer:

x=4

Step-by-step explanation:

3x-5 = 7

Add 5 to each side

3x-5+5 = 7+5

3x = 12

Divide each side by 3

3x/3 = 12/3

x = 4

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5(x+3)-7(6-3)+29=50-3(8-x)

Sveta_85 [38]

Answer:

$\quad x=\frac{3}{2}$

Step-by-step explanation:

$7\left(6-3\right)=21$ , $\mathrm{Expand\:}5\left(x+3\right)-21+29:\quad5x+23$ , $\mathrm{Expand\:}50-3\left(8-x\right):\quad 3x+26$ , Subtract 23 and 3x from both sides and simplify: $2x=3$ , Divide both sides by 2 and simplify: $x=\frac{3}{2}$