Question

15. 3(x + 2) - 2(x - 1) = 7 with verify​

Answer 1

Step-by-step explanation:

3x+6-2x+2=7

x+8=7

x=7-8

x=-1

Answer 2

Answer:

3(x+2) = 3x+6

2(x-1) = 2x-2

so 3(x + 2) - 2(x - 1) = 3x+6 - (2x-2) = 3x+6 -2x +2

3x+6 - 2x+2 = 7

x + 8 = 7

x= -1

VERIFICATION

Substitute x=-1 in LHS

LHS = 3(x + 2) - 2(x - 1)

LHS= 3( -1 +2) -2( -1 + -1)

LHS = 3× 1 + -2 × -2

LHS = 3 + 4 = 7

RHS = 7

SO LHS =RHS

.: PROVED

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