Question

resolva as equações

x-3=9
4x-7= 1
x+5=20
3x+10=2x-30

Answer 1

Resposta:

X-3=9

x=9+3

x=12

4x-9=1-2x

4x+2x=1+9

6x=10

X= 10/6

x=1,66

x+5=20-4x

x+4x=20-5

5x=15

x=15/5=3

3x+10=2x-30

3x-2x=-30-10

x=-40

espero ter ajudado

Answer 2

$\boxed{\begin{array}{lr}x-3=9\\x=9+3\\\huge\boxed{\sf x=12 }\end{array}}\\\\\\\boxed{\begin{array}{lr}4x-7=1\\4x=1+7\\4x=8\\x=8/4\\\huge\boxed{\sf x=2 }\end{array}}\\\\\\\boxed{\begin{array}{lr}x+5=20\\x=20-5\\\huge\boxed{\sf x=15 }\end{array}}\\\\\\\boxed{\begin{array}{lr}3x+10=2x-30\\3x-2x=-30-10\\\huge\boxed{\sf x=-40 }\end{array}} \\\\\\:)$