Answer:
x= -6 | I only have an answer for #7 but you should use a website called Symbolab :)
Step-by-step explanation:
x+16+x+12+2x+15=19
group like terms:
4x+43=19
subtract 43 from both sides:
4x+43=19
-43 -43
simplify:
4x=-24
divided both sides by 4:
x=-6
